What are y’all seeing ?
Seems like razor core has high ES and hit and Miss accuracy.
Any good mk262 clones
Seems like razor core has high ES and hit and Miss accuracy.
Any good mk262 clones
Mk262 alternatives ?
- Thread starter deersniper
- Start date
I've honestly had good luck with IMI Razor Core from the two rifles I use it in the most. Accuracy has been consistent, although I can't comment on the ES/SD's, I'd have to look those figures up in my notes.
I've tried some other flavors of 77gr match ammo and they were accurate but much slower then IMI or Mk 262 Mod 1, so I went back to IMI.
I've been curious to try out some PMC 77 gr OTM but it's more expensive then IMI so I don't see the juice being worth the squeeze there.
I've tried some other flavors of 77gr match ammo and they were accurate but much slower then IMI or Mk 262 Mod 1, so I went back to IMI.
I've been curious to try out some PMC 77 gr OTM but it's more expensive then IMI so I don't see the juice being worth the squeeze there.
Me personally, I've had mixed results with Hornady ammo from my AR's, bolt guns are a different story though.
That being said, I haven't tried their Superformance ammo, however I have tried their Frontier 5.56 55 gr, 62gr, and 75 gr Match, .223 73 gr ELD Match (white box), and .223 75 gr BTHP Match (white box). Surprisingly the Frontier 55gr and 62gr HP Match did pretty well but Frontier 75 gr HP Match was pretty crappy from my rifles. 73gr ELD Match didn't have the accuracy I was looking for despite having great ES/SD numbers where the 75 gr BTHP ammo was the opposite, very good accuracy with mediocre ES/SD's.
I've tried the Sig .223 77gr OTM as well and the accuracy from that ammunition was great but the velocity was pretty slow out of an 18" barrel.
I got kinda tired chasing my tail and blowing money trying to find an option that was equal to or better than the IMI from my guns so now I just stick with the IMI and occasionally shoot regular ball ammo if I'm just banging some steel.
Not sure what you think factory loaded 5.56mm ammunition should be doing, but IMI 77 Razor Core is more than adequate for it's category. If you want something better than the IMI in 5.56mm 77 grain factory loaded ammunition, you'll need to spend the money for Black Hills MK262 or Black Hills 77 grain Tipped MatchKing.
IMI “Razor Core” 77 Grain OTM, LR, Mod 1
This load is topped with a 77 grain OTM bullet with a cannelure. The case mouth is sealed and the primers are crimped and sealed. When chronographed from the 20” Colt barrel, the load had a muzzle velocity of 2866 FPS with a standard deviation of 21 FPS.
A 10-shot group group fired off the bench from my Lothar-Walther barreled AR-15 at a distance of 100 yards had an extreme spread of 0.95”.
continued . . .
Last edited:
Black Hills MK262 Mod1 Ammunition
The 77 grain MK262 ammunition produced by Black Hills Ammunition has been referred to as the most accurate mass-produced 5.56mm ammunition that has ever been type-classified and issued by the US military. Since its inception, genuine MK262 has been manufactured solely by Black Hills Ammunition. For years, MK262 was only available to the civilian population as “seconds,” but more recently Black Hills has made first-run production lots available on the commercial market. It is the first-run version of MK262 Mod 1 that I tested for this report.
MK262 Mod 1 is loaded in WCC 5.56mm brass and uses a cannelured version of the 77 grain Sierra MatchKing. The round is charged with a proprietary ball powder. The primer pockets are crimped and sealed. Contrary to erroneous information that has been posted on the Internet, MK262 Mod 1 does not have case-mouth sealant.
The 77 grain MK262 Mod 1 projectile compared to the M193 projectile.
MK262 powder. (The squares of the red grid measure 1/10 of an inch.)
Velocity
I chronographed the Black Hills 5.56mm MK262 Mod 1 ammunition from a semi-automatic AR-15 with a chrome-lined, NATO chambered 20” Colt M16A2 barrel.
Chronographing was conducted using an Oehler 35-P chronograph with “proof screen” technology. The Oehler 35P chronograph is actually two chronographs in one package that takes two separate chronograph readings for each shot and then has its onboard computer analyze the data to determine if there is any statistically significant difference between the two readings. If there is, the chronograph “flags” the shot to let you know that the data is invalid. There was no invalid data flagged during this testing.
The velocity stated below is the muzzle velocity as calculated from the instrumental velocity using Oehler’s Ballistic Explorer software program. The string of fire consisted of 10 rounds over the chronograph.
Each round was single-loaded and cycled into the chamber from a magazine fitted with a single-load follower. The bolt locked-back after each shot allowing the chamber to cool in between each shot. This technique was used to mitigate the possible influence of “chamber-soak” on velocity data. Each new shot was fired in a consistent manner after hitting the bolt release. Atmospheric conditions were monitored and recorded using a Kestrel 4000 Pocket Weather Tracker.
Atmospheric conditions
Temperature: 79 degrees F
Humidity: 37%
Barometric pressure: 30.12 inches of Hg
Elevation: 950 feet above sea level
The muzzle velocity for the 10-shot string of the Black Hills 5.56mm MK262 Mod 1 ammunition fired from the 20” Colt barrel was 2848 FPS with a standard deviation of 10 FPS and a coefficient of variation of 0.35%
For those of you who might not be familiar with the coefficient of variation (CV), it is the standard deviation, divided by the mean (average) muzzle velocity and then multiplied by 100 and expressed as a percentage. It allows for the comparison of the uniformity of velocity between loads in different velocity spectrums; e.g. 77 grain loads running around 2,650 fps compared to 55 grain loads running around 3,250 fps.
For comparison (and to give you an idea of how good the CV is for this factory loaded MK262 Mod 1 ammunition) the mil-spec for M193 allows for a coefficient of variation of approximately 1.2%, while one of my best 77 grain OTM hand-loads, with a muzzle velocity of 2639 PFS and a standard deviation of 4 FPS, has a coefficient of variation of 0.15%.
Accuracy
The specification for the accuracy/precision portion of the lot-acceptance-testing of MK262 calls for multiple 10shot groups to be fired from machine-rested, heavy test barrels. I conducted an accuracy (technically, precision) evaluation of the first-run MK262 Mod 1 ammunition following my usual protocol. This accuracy evaluation used statistically significant shot-group sizes and every single shot in a fired group was included in the measurements. There was absolutely no use of any Group Reduction Techniques (e.g. fliers, target movement, Butterfly Shots).
The shooting set-up will be described in detail below. As many of the significant variables as was practicable were controlled for. Also, a control group was fired from the test-rifle used in the evaluation using match-grade, hand-loaded ammunition; in order to demonstrate the capability of the barrel. Pictures of shot-groups are posted for documentation.
All shooting was conducted from a concrete bench-rest from a distance of 100 yards (confirmed with a laser rangefinder.) The barrel used in the evaluation was free-floated. The free-float handguards of the rifle rested in a Sinclair Windage Benchrest, while the stock of the rifle rested in a Protektor bunny-ear rear bag. Sighting was accomplished via a Leupold VARI-X III set at 25X magnification and adjusted to be parallax-free at 100 yards. A mirage shade was attached to the top of the free-float hand-guard. Wind conditions on the shooting range were continuously monitored using a Wind Probe. The set-up was very similar to that pictured below.
The Wind Probe.
The test vehicle for this evaluation was one of my semi-automatic precision AR-15s with a 20” stainless-steel Lothar Walther barrel. The barrel has a 223 Wylde chamber with a 1:8” twist.
Prior to firing the MK262 ammunition, I fired a 10-shot control group using match-grade hand-loads topped with the Sierra 77 grain MatchKing. That group had an extreme spread of 0.69”.
Three 10-shot groups of the MK262 Mod 1 were fired in a row with the resulting extreme spreads (from smallest to largest):
0.96”
1.12”
1.21”
for a 10-shot group average extreme spread of 1.10”. The three 10-shot groups were over-layed on each other using RSI Shooting Lab to form a 30-shot composite group. The mean radius for the 30-shot composite group was 0.33”.
The smallest 10-shot group.
The 30-shot composite group.
….
The 77 grain MK262 ammunition produced by Black Hills Ammunition has been referred to as the most accurate mass-produced 5.56mm ammunition that has ever been type-classified and issued by the US military. Since its inception, genuine MK262 has been manufactured solely by Black Hills Ammunition. For years, MK262 was only available to the civilian population as “seconds,” but more recently Black Hills has made first-run production lots available on the commercial market. It is the first-run version of MK262 Mod 1 that I tested for this report.
MK262 Mod 1 is loaded in WCC 5.56mm brass and uses a cannelured version of the 77 grain Sierra MatchKing. The round is charged with a proprietary ball powder. The primer pockets are crimped and sealed. Contrary to erroneous information that has been posted on the Internet, MK262 Mod 1 does not have case-mouth sealant.
The 77 grain MK262 Mod 1 projectile compared to the M193 projectile.
MK262 powder. (The squares of the red grid measure 1/10 of an inch.)
Velocity
I chronographed the Black Hills 5.56mm MK262 Mod 1 ammunition from a semi-automatic AR-15 with a chrome-lined, NATO chambered 20” Colt M16A2 barrel.
Chronographing was conducted using an Oehler 35-P chronograph with “proof screen” technology. The Oehler 35P chronograph is actually two chronographs in one package that takes two separate chronograph readings for each shot and then has its onboard computer analyze the data to determine if there is any statistically significant difference between the two readings. If there is, the chronograph “flags” the shot to let you know that the data is invalid. There was no invalid data flagged during this testing.
The velocity stated below is the muzzle velocity as calculated from the instrumental velocity using Oehler’s Ballistic Explorer software program. The string of fire consisted of 10 rounds over the chronograph.
Each round was single-loaded and cycled into the chamber from a magazine fitted with a single-load follower. The bolt locked-back after each shot allowing the chamber to cool in between each shot. This technique was used to mitigate the possible influence of “chamber-soak” on velocity data. Each new shot was fired in a consistent manner after hitting the bolt release. Atmospheric conditions were monitored and recorded using a Kestrel 4000 Pocket Weather Tracker.
Atmospheric conditions
Temperature: 79 degrees F
Humidity: 37%
Barometric pressure: 30.12 inches of Hg
Elevation: 950 feet above sea level
The muzzle velocity for the 10-shot string of the Black Hills 5.56mm MK262 Mod 1 ammunition fired from the 20” Colt barrel was 2848 FPS with a standard deviation of 10 FPS and a coefficient of variation of 0.35%
For those of you who might not be familiar with the coefficient of variation (CV), it is the standard deviation, divided by the mean (average) muzzle velocity and then multiplied by 100 and expressed as a percentage. It allows for the comparison of the uniformity of velocity between loads in different velocity spectrums; e.g. 77 grain loads running around 2,650 fps compared to 55 grain loads running around 3,250 fps.
For comparison (and to give you an idea of how good the CV is for this factory loaded MK262 Mod 1 ammunition) the mil-spec for M193 allows for a coefficient of variation of approximately 1.2%, while one of my best 77 grain OTM hand-loads, with a muzzle velocity of 2639 PFS and a standard deviation of 4 FPS, has a coefficient of variation of 0.15%.
Accuracy
The specification for the accuracy/precision portion of the lot-acceptance-testing of MK262 calls for multiple 10shot groups to be fired from machine-rested, heavy test barrels. I conducted an accuracy (technically, precision) evaluation of the first-run MK262 Mod 1 ammunition following my usual protocol. This accuracy evaluation used statistically significant shot-group sizes and every single shot in a fired group was included in the measurements. There was absolutely no use of any Group Reduction Techniques (e.g. fliers, target movement, Butterfly Shots).
The shooting set-up will be described in detail below. As many of the significant variables as was practicable were controlled for. Also, a control group was fired from the test-rifle used in the evaluation using match-grade, hand-loaded ammunition; in order to demonstrate the capability of the barrel. Pictures of shot-groups are posted for documentation.
All shooting was conducted from a concrete bench-rest from a distance of 100 yards (confirmed with a laser rangefinder.) The barrel used in the evaluation was free-floated. The free-float handguards of the rifle rested in a Sinclair Windage Benchrest, while the stock of the rifle rested in a Protektor bunny-ear rear bag. Sighting was accomplished via a Leupold VARI-X III set at 25X magnification and adjusted to be parallax-free at 100 yards. A mirage shade was attached to the top of the free-float hand-guard. Wind conditions on the shooting range were continuously monitored using a Wind Probe. The set-up was very similar to that pictured below.
The Wind Probe.
The test vehicle for this evaluation was one of my semi-automatic precision AR-15s with a 20” stainless-steel Lothar Walther barrel. The barrel has a 223 Wylde chamber with a 1:8” twist.
Prior to firing the MK262 ammunition, I fired a 10-shot control group using match-grade hand-loads topped with the Sierra 77 grain MatchKing. That group had an extreme spread of 0.69”.
Three 10-shot groups of the MK262 Mod 1 were fired in a row with the resulting extreme spreads (from smallest to largest):
0.96”
1.12”
1.21”
for a 10-shot group average extreme spread of 1.10”. The three 10-shot groups were over-layed on each other using RSI Shooting Lab to form a 30-shot composite group. The mean radius for the 30-shot composite group was 0.33”.
The smallest 10-shot group.
The 30-shot composite group.
….
Black Hills 5.56mm 77 Grain Tipped MatchKing Ammunition
The Black Hills 5.56mm 77 grain Tipped MatchKing ammunition is loaded with the same Sierra 77 grain Tipped MatchKing projectile that is available as a reloading component (#7177), with the addition of a cannelure. The Black Hills ammunition was actually brought to market before the reloading component was.
The 77 grain Tipped MatchKing is the longest bullet (that I’m aware of) that is currently being loaded by a major manufacturer to magazine length for the 5.56mm cartridge.
With a nominal length of 1.070”, the 77 grain Tipped MatchKing is 0.335” longer than a 55 grain FMJ bullet and 0.085” longer than the standard Sierra 77 grain MatchKing.
Not only is the bullet itself long, but the ogive section of the 77 grain Tipped MatchKing is also extremely long for a bullet loaded to magazine length in the 5.56mm cartridge; so much so, that the grooves of the cannelure extend into the ogive of the bullet, as evidenced by the “arrow head” shaped cannelure grooves.
The Black Hills 77 grain Tipped MatchKing ammunition is loaded in 5.56mm WCC brass that has the annealing iris still visible. The primer pockets are crimped and sealed. The case-mouth is crimped but has no sealant. The load is charged with “ball powder.”
Velocity
I chronographed the Black Hills 77 grain Tipped MatchKing ammunition from a semi-automatic AR-15 with a chrome-lined, NATO chambered 20” Colt M16A2 barrel with a 1:7” twist.
Chronographing was conducted using an Oehler 35-P chronograph with “proof screen” technology. The Oehler 35P chronograph is actually two chronographs in one package that takes two separate chronograph readings for each shot and then utilizes its onboard computer to analyze the data to determine if there is any statistically significant difference between the two readings. If there is a statistically significant difference in the readings, the chronograph “flags” the shot to let you know that the data is invalid. There was no invalid data flagged during this testing.
The velocities stated below are the muzzle velocities as calculated from the instrumental velocities using Oehler’s Ballistic Explorer software program. The strings of fire consisted of 10 rounds over the chronograph.
Each round was single-loaded and cycled into the chamber from a magazine fitted with a single-load follower. The bolt locked-back after each shot allowing the chamber to cool in between each shot. This technique was used to mitigate the possible influence of “chamber-soak” on velocity data. Each new shot was fired in a consistent manner after hitting the bolt release. Atmospheric conditions were monitored and recorded using a Kestrel 4000 Pocket Weather Tracker.
Atmospheric conditions
Temperature: 72 degrees F
Humidity: 44%
Barometric pressure: 29.64 inches of Hg
Elevation: 950 feet above sea level
The muzzle velocity for the 10-shot string of the Black Hills 77 grain Tipped MatchKing ammunition fired from the 20” Colt barrel was 2808 FPS with a standard deviation of 14 FPS and a coefficient of variation of 0.50%.
For those of you who might not be familiar with the coefficient of variation (CV), it is the standard deviation, divided by the mean (average) muzzle velocity and then multiplied by 100 and expressed as a percentage. It allows for the comparison of the uniformity of velocity between loads in different velocity spectrums; e.g. 77 grain loads running around 2,650 fps compared to 55 grain loads running around 3,250 fps.
For comparison, the mil-spec for M193 allows for a coefficient of variation of approximately 1.2%, while one of my best 77 grain OTM hand-loads, with a muzzle velocity of 2639 PFS and a standard deviation of 4 FPS, has a coefficient of variation of 0.15%.
Accuracy
I conducted an accuracy (technically, precision) evaluation of the Black Hills 77 grain Tipped MatchKing ammunition following my usual protocol. This accuracy evaluation used statistically significant shot-group sizes and every single shot in a fired group was included in the measurements. There was absolutely no use of any group-reduction techniques (e.g. fliers, target movement, Butterfly Shots).
The shooting set-up will be described in detail below. As many of the significant variables as was practicable were controlled for. Also, a control group was fired from the test-rifle used in the evaluation using match-grade, hand-loaded ammunition; in order to demonstrate the capability of the barrel. Pictures of shot-groups are posted for documentation.
All shooting was conducted from a concrete bench-rest from a distance of 100 yards (confirmed with a laser rangefinder.) The barrel used in the evaluation was free-floated. The free-float handguards of the rifle rested in a Sinclair Windage Benchrest, while the stock of the rifle rested in a Protektor bunny-ear rear bag. Sighting was accomplished via a Leupold VARI-X III set at 25x magnification and adjusted to be parallax-free at 100 yards. A mirage shade was attached to the top of the free-float hand-guard. Wind conditions on the shooting range were continuously monitored using a Wind Probe. The set-up was very similar to that pictured below.
The Wind Probe.
The test vehicle for this accuracy evaluation was one of my semi-automatic precision AR-15s with a 20” stainless-steel Lothar-Walther barrel. The barrel has a 223 Wylde chamber with a 1.8” twist. Prior to firing the Black Hills 77 grain Tipped MatchKing, I fired a 10-shot control group using match-grade hand-loads topped with the Sierra 77 grain Tipped MatchKing (without a canelure). That group had an extreme spread of 0.68”.
The control group . . .
Three 10-shot groups of the Black Hills 77 grain Tipped MatchKings ammunition were fired in a row with the resulting extreme spreads:
1.26”
1.14”
1.37”
for a 10-shot group average extreme spread of 1.26”. The three 10-shot groups were over-layed on each other using RSI Shooting Lab to form a 30-shot composite group. The mean radius for the 30-shot composite group was 0.41”.
The smallest 10-shot group . . .
The 30-shot composite group . . .
MK262 Comparison
The table below compares the test results from this article to my previously obtained test data for Black Hills MK262 Mod 1 ammunition, which is loaded with the standard Sierra 77 grain MatchKing (with a cannelure.)
A.E.S = average extreme spread for three 10-shot groups at 100 yards
M.R. = mean radius for the 30-shot composite group
M.V. = muzzle velocity
S.D. = standard deviation of muzzle velocity
C.V. = coefficient of variation of muzzle velocity
…
The Black Hills 5.56mm 77 grain Tipped MatchKing ammunition is loaded with the same Sierra 77 grain Tipped MatchKing projectile that is available as a reloading component (#7177), with the addition of a cannelure. The Black Hills ammunition was actually brought to market before the reloading component was.
The 77 grain Tipped MatchKing is the longest bullet (that I’m aware of) that is currently being loaded by a major manufacturer to magazine length for the 5.56mm cartridge.
With a nominal length of 1.070”, the 77 grain Tipped MatchKing is 0.335” longer than a 55 grain FMJ bullet and 0.085” longer than the standard Sierra 77 grain MatchKing.
Not only is the bullet itself long, but the ogive section of the 77 grain Tipped MatchKing is also extremely long for a bullet loaded to magazine length in the 5.56mm cartridge; so much so, that the grooves of the cannelure extend into the ogive of the bullet, as evidenced by the “arrow head” shaped cannelure grooves.
The Black Hills 77 grain Tipped MatchKing ammunition is loaded in 5.56mm WCC brass that has the annealing iris still visible. The primer pockets are crimped and sealed. The case-mouth is crimped but has no sealant. The load is charged with “ball powder.”
Velocity
I chronographed the Black Hills 77 grain Tipped MatchKing ammunition from a semi-automatic AR-15 with a chrome-lined, NATO chambered 20” Colt M16A2 barrel with a 1:7” twist.
Chronographing was conducted using an Oehler 35-P chronograph with “proof screen” technology. The Oehler 35P chronograph is actually two chronographs in one package that takes two separate chronograph readings for each shot and then utilizes its onboard computer to analyze the data to determine if there is any statistically significant difference between the two readings. If there is a statistically significant difference in the readings, the chronograph “flags” the shot to let you know that the data is invalid. There was no invalid data flagged during this testing.
The velocities stated below are the muzzle velocities as calculated from the instrumental velocities using Oehler’s Ballistic Explorer software program. The strings of fire consisted of 10 rounds over the chronograph.
Each round was single-loaded and cycled into the chamber from a magazine fitted with a single-load follower. The bolt locked-back after each shot allowing the chamber to cool in between each shot. This technique was used to mitigate the possible influence of “chamber-soak” on velocity data. Each new shot was fired in a consistent manner after hitting the bolt release. Atmospheric conditions were monitored and recorded using a Kestrel 4000 Pocket Weather Tracker.
Atmospheric conditions
Temperature: 72 degrees F
Humidity: 44%
Barometric pressure: 29.64 inches of Hg
Elevation: 950 feet above sea level
The muzzle velocity for the 10-shot string of the Black Hills 77 grain Tipped MatchKing ammunition fired from the 20” Colt barrel was 2808 FPS with a standard deviation of 14 FPS and a coefficient of variation of 0.50%.
For those of you who might not be familiar with the coefficient of variation (CV), it is the standard deviation, divided by the mean (average) muzzle velocity and then multiplied by 100 and expressed as a percentage. It allows for the comparison of the uniformity of velocity between loads in different velocity spectrums; e.g. 77 grain loads running around 2,650 fps compared to 55 grain loads running around 3,250 fps.
For comparison, the mil-spec for M193 allows for a coefficient of variation of approximately 1.2%, while one of my best 77 grain OTM hand-loads, with a muzzle velocity of 2639 PFS and a standard deviation of 4 FPS, has a coefficient of variation of 0.15%.
Accuracy
I conducted an accuracy (technically, precision) evaluation of the Black Hills 77 grain Tipped MatchKing ammunition following my usual protocol. This accuracy evaluation used statistically significant shot-group sizes and every single shot in a fired group was included in the measurements. There was absolutely no use of any group-reduction techniques (e.g. fliers, target movement, Butterfly Shots).
The shooting set-up will be described in detail below. As many of the significant variables as was practicable were controlled for. Also, a control group was fired from the test-rifle used in the evaluation using match-grade, hand-loaded ammunition; in order to demonstrate the capability of the barrel. Pictures of shot-groups are posted for documentation.
All shooting was conducted from a concrete bench-rest from a distance of 100 yards (confirmed with a laser rangefinder.) The barrel used in the evaluation was free-floated. The free-float handguards of the rifle rested in a Sinclair Windage Benchrest, while the stock of the rifle rested in a Protektor bunny-ear rear bag. Sighting was accomplished via a Leupold VARI-X III set at 25x magnification and adjusted to be parallax-free at 100 yards. A mirage shade was attached to the top of the free-float hand-guard. Wind conditions on the shooting range were continuously monitored using a Wind Probe. The set-up was very similar to that pictured below.
The Wind Probe.
The test vehicle for this accuracy evaluation was one of my semi-automatic precision AR-15s with a 20” stainless-steel Lothar-Walther barrel. The barrel has a 223 Wylde chamber with a 1.8” twist. Prior to firing the Black Hills 77 grain Tipped MatchKing, I fired a 10-shot control group using match-grade hand-loads topped with the Sierra 77 grain Tipped MatchKing (without a canelure). That group had an extreme spread of 0.68”.
The control group . . .
Three 10-shot groups of the Black Hills 77 grain Tipped MatchKings ammunition were fired in a row with the resulting extreme spreads:
1.26”
1.14”
1.37”
for a 10-shot group average extreme spread of 1.26”. The three 10-shot groups were over-layed on each other using RSI Shooting Lab to form a 30-shot composite group. The mean radius for the 30-shot composite group was 0.41”.
The smallest 10-shot group . . .
The 30-shot composite group . . .
MK262 Comparison
The table below compares the test results from this article to my previously obtained test data for Black Hills MK262 Mod 1 ammunition, which is loaded with the standard Sierra 77 grain MatchKing (with a cannelure.)
A.E.S = average extreme spread for three 10-shot groups at 100 yards
M.R. = mean radius for the 30-shot composite group
M.V. = muzzle velocity
S.D. = standard deviation of muzzle velocity
C.V. = coefficient of variation of muzzle velocity
…
Thanks for all the work you do ^
But seems like balck hills smk is very very hard to find. And the TMK is impossible
I have both but hate shooting up my good stash at rat a tat matches
But seems like balck hills smk is very very hard to find. And the TMK is impossible
I have both but hate shooting up my good stash at rat a tat matches
My "load it in the mag and shoot it" experience with IMI 77gr Razercore has been very positive across 2-3K rounds in a number of precisiony carbines. It generally shoots MOA for me (sometimes a little better, sometimes MOA+). One case lot to another has been consistent. I've shot it for groups; I've shot it for scoped carbine courses. It's the best bulk available precision 556 available at the moment.
When I was shooting factory ammo, the black hills stuff always shot the best(obviously), but the imi razor core shot pretty good too. I’ve since transitioned to reloading and once you go that route you can pretty much pick anything you want and play around.
77 Razorcore has been good in every good rifle I've tried it in.............can't get any 262, & if I cound the price is prohibitive in any volume, so hard to so how much better it might be in the same guns, but the RC is good enough in a good gun.
Magtech CDC is good too but there is none available & hasn't been for more than a year or so.
Dropping down to 69's the Outback stuff has been good in most guns too, better in some than others.
I can do better with handloads than with the RC, Magtech or Outback, but not a real difference maker in a practical sense for the most part. To absolute paper punchers, or for bragging rights,maybe.
YMMV
MM
Magtech CDC is good too but there is none available & hasn't been for more than a year or so.
Dropping down to 69's the Outback stuff has been good in most guns too, better in some than others.
I can do better with handloads than with the RC, Magtech or Outback, but not a real difference maker in a practical sense for the most part. To absolute paper punchers, or for bragging rights,maybe.
YMMV
MM
My experience with IMI 77gr is consistent:
Accuracy goes to shit (1.5-2moa still good'nuff for most things) above roughly 80⁰f powder temp. Below that, you're shittin'n tall cotton (0.75-1.25moa).
I do 25gr of AA2520 under a 77 to replicate loads out of my PRI Mk12 Mod0 upper.
Is anyone else having this issue? Consider here in So Cal 80 + degrees is normally at least half the year.
I have had good luck with the IMI 77grain ammo . this is the second year I have used it in prs style gas gun matches . It hovers around 1 moa with me being the biggest factor in group size . I shot an evening match 2 days ago in temps that were 98 degree's with a 105 heat index . the rifle and ammo held up much better than I did . our farthest target is 700 yds with most between 400 ad 600 . with the price of component's these days the difference in shooting factory and reloading really isn't that much .
Stop being poor and buy a press with auto drive like @MarinePMI
Get it set up then run 1000s at a time.
Your cpr on a good mk262 clone with processed 556 brass is going to be around 60c a pop
Get it set up then run 1000s at a time.
Your cpr on a good mk262 clone with processed 556 brass is going to be around 60c a pop
Gotta process brass find bullets find powder set that up etc.
Ain’t nobody got time for that. Not me anyway. I don’t have. Time to shoot. Got multiple un zeroed guns as is etc.
Business and crotch goblins take all the time
i use 77gr imi in my 1/8 walther 16" and adi f1 in my bal adv 16" 1/8. the imi is more accurate in both guns. at rare times 1 MOA but almost always at 2-3. hits at 600 with it in both guns are fairly easy with right sight picture. wish by bolt guns were wyldes like my ARs. would certainly use it. i would expect acceptable accuracy for price compared to the v.expensive stuff.
Yeah, shoots great out of my 20" Ranier ultramatch barrel, just a little slow.
IMI is my go to for two guns, never had any issues.
After watching Johnny's Reloading bench, and working up like he did, 25.2 grains of A2520 in Lapua brass, with Berger OTM 77 (unobtainium right now) or Lapua 77 Scenars shoot sub-MOA (.7/.8") out of my PRI Mk12 7-twist, getting average of 2760fps. However if you don't reload, then I've found the Sig Marskman 223 with 77grn OTMs will shoot at just about 1MOA. That's good for coyotes out to 500yds.
This has been my experience with the RC in several guns.............hovers right around 1"- 1.25" for the most part.
Not quite are good as my best handloads, but plenty good enough for everything but internet bragging rights.
I've seen a fair number of positive reports on ASYM too, but have never fired any.
MM
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