22 creedmoor
- Thread starter Subhunter2
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Had some black friday deals so I went with a 1/7.5tw benchmark button rifled 6 grooves med palma for my 18in jack of all trade rifle on a ARC CDG with a xylo chassis for the 75-88gr weight range and I also got a carbon wrapped 1/7 18in for my defiance anti ultra lightweight hnt26 for the 77 lrx for dedicated varmint and white tail gun.
Going to use N555 exclusively with Alpha SRP brass.
Probably won't do much of load dev since the barrel life is short on these, I'll target for 3200 for the LRX, 80.5 and 3100 for the 88s which should be able 39-41gr of N550 at 2.65 according to VV, Hornady and QL
Going to use N555 exclusively with Alpha SRP brass.
Probably won't do much of load dev since the barrel life is short on these, I'll target for 3200 for the LRX, 80.5 and 3100 for the 88s which should be able 39-41gr of N550 at 2.65 according to VV, Hornady and QL
I shoot N555 in alpha srp brass, 18in 7.5tw 4gr 237 bore ace barrel. You're desired speed will likely require more powder. My barrel was cut with alpha 169fb chamber. I'm jumping 88s bout 50k at 2.71 oal, and with a drop tube, 43.5gr was all I could fit, 3150mv. Shoots well there but a bit toasty, dropped to 42.1gr and running 3040mv, all weather safe load. Just my experience with your exact desired load combo. Good luck!
Hornady match 6 creed bushing die with a .250 TiN bushing and an undersized button on the de-capper Then it gets ran over a mandrel.
I recently screwed on a varmint contour 24" Shilen 7.5 twist ratchet rifled barrel. I will report back on how it works with the Hornady bullets... I am planning to primarily shoot the 80 ELDx which I am hoping will also avoid blow up issues due to its thicker jacket. The initial loads will be with H4350 and Alpha brass.
Figured I would report back on initial loads. All loads shot out of a 24" Shilen Select Match with 1/7.5 twist on a Rem 700 action.
Used the 80 ELD-X and 64 Nosler Bonded. All were Alpha LRP brass with CCI-200's.
Both H1000 and N565 are a little on the slow side with 80's. Topped out around 3150 with 45 gr of each (they were equivalent), and this was a compressed load. No concern for pressure.
With H4350 and the 80's, I topped out at 38 gr and 3050 fps. I think H4350 is a bit too fast for maximum velocity.
The Nosler 64's got up to 3550 with 42.5 gr of H4350. Didn't try any slower powders.
Plan for next session is to try some N555, N560, and Superformance.
Used the 80 ELD-X and 64 Nosler Bonded. All were Alpha LRP brass with CCI-200's.
Both H1000 and N565 are a little on the slow side with 80's. Topped out around 3150 with 45 gr of each (they were equivalent), and this was a compressed load. No concern for pressure.
With H4350 and the 80's, I topped out at 38 gr and 3050 fps. I think H4350 is a bit too fast for maximum velocity.
The Nosler 64's got up to 3550 with 42.5 gr of H4350. Didn't try any slower powders.
Plan for next session is to try some N555, N560, and Superformance.
I'm hoping to hit the range this week. 42.0gr N550, 77 LRX-BT, 2.622in coal. 18in barrel
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Just did a quick velocity test on the farm.
This load gets me 3200FPS with a very slight swipe.
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Some N555 numbers.
Very impressed with the velocity spread.
18in CW barrel, 0.090 FB Manson reamer
Alpha SRP brass
Brand new barrel.
Berger 80.5
2.665in coal
42.3gr N555
3175 FPS. SD 5 ES 13.
Very tight. All 5 groups were easy 1/2-3/4 moa. I’ve never had to do any load dev with these bullet, same results in my 223 rem.
Barnes LRX 77
2.620in coal
41.7gr N555
3180 FPS SD6 ES 15
Dogshit accuracy. I think these need more jump. I’ll try again at 2.58in and if I can’t find anything decent I’ll dump them for Speer 75 GD or the 77 TMK
Very impressed with the velocity spread.
18in CW barrel, 0.090 FB Manson reamer
Alpha SRP brass
Brand new barrel.
Berger 80.5
2.665in coal
42.3gr N555
3175 FPS. SD 5 ES 13.
Very tight. All 5 groups were easy 1/2-3/4 moa. I’ve never had to do any load dev with these bullet, same results in my 223 rem.
Barnes LRX 77
2.620in coal
41.7gr N555
3180 FPS SD6 ES 15
Dogshit accuracy. I think these need more jump. I’ll try again at 2.58in and if I can’t find anything decent I’ll dump them for Speer 75 GD or the 77 TMK
For zero load development, I’d say that’s pretty goodThey should be able to shoot tighter, no?
For this specific build, 1/2 even 3/4 moa will do. It'll be the wife's coyote/white tail gun and it's topped with a S&B 3-12 with a fairly heavy P3 reticle on a HNT26 chassis.
I have another barrel inbound from my smith for my heavy ARC CDG that will be a dedicated precision build. I promise it'll shoot like yours.
I did exactly what you plan to do for my first barrel break in. I necked down Hornady 6CM brass using a .254 bushing then used a .2225 neck expander. My loaded neck diameter was .254 using 75 grain ELD's over 38.4 grains of H4350.
Building a 22 Creedmoor, 26 “ heavy barrel. Plan to shoot Berger 85.5s using Peterson brass. What kind of free bore would you say I need? Figure I would use an alpha reamer (.120 or .165) was thinking the .120 but not sure how far I need to seat the bullets out to get some speed.
In the process of putting my 22 creed together.22” 1-8 proof barrel.
It will be a dedicated thermal coyote hunting rig so I’ll never shoot anything heavier than a 69gr tmk. Planed to shoot the berger 60 gr varmints, 62 gr varmageddons or possibly the 62 gr eldvt.
Fast and flat is the game.
Couple places i
See people suggest n540 ,rl16,rl17… has anyone run leverevolution, rl15.5 or cfe223? How was your speed and accuracy
It will be a dedicated thermal coyote hunting rig so I’ll never shoot anything heavier than a 69gr tmk. Planed to shoot the berger 60 gr varmints, 62 gr varmageddons or possibly the 62 gr eldvt.
Fast and flat is the game.
Couple places i
See people suggest n540 ,rl16,rl17… has anyone run leverevolution, rl15.5 or cfe223? How was your speed and accuracy
Had an interesting range day.
Good news:
Found a decent load with the 77LRX (pic below), they needed way more jump than I thought. I did this group at 2.575in coal (0.060 jump)
Brand new Alpha brass, CCI 450, 41.7gr N555
Bad news:
This is not a cartridge that works in the cold with N555 and SRP. I've never had an issue with the CCI 450s in 6.5 creed and H4350 in the cold but today it was barely below freezing and snowing a bit and I was getting really bad ignition issues. Make sense since N555 is slower burning than 4350.
Also tried a brand new PVA jet 6mm muzzle brake and for whatever reason, it gave me 2+ moa vertical. Very odd.
Good news:
Found a decent load with the 77LRX (pic below), they needed way more jump than I thought. I did this group at 2.575in coal (0.060 jump)
Brand new Alpha brass, CCI 450, 41.7gr N555
Bad news:
This is not a cartridge that works in the cold with N555 and SRP. I've never had an issue with the CCI 450s in 6.5 creed and H4350 in the cold but today it was barely below freezing and snowing a bit and I was getting really bad ignition issues. Make sense since N555 is slower burning than 4350.
Also tried a brand new PVA jet 6mm muzzle brake and for whatever reason, it gave me 2+ moa vertical. Very odd.
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I'd go with N540. It's the most temp stable out of that list and will easily give you 3550-3650FPS out of the 55-60gr
N550 would also work probably even better. Bit more speed, bit less pressure, bit more case fill.
Like you I live in a frozen waste land . So temp stability is something I always look for. Usually load development is in warmer weather. Try to avoid doing it in the winter incase of pressure spikes do to heat
Well if you live or plan to hunt anywhere that’s cold learn from my mistake and don’t buy 300 pcs of SRP brass. Fuck me.
I live in western ny. Supposed to drop below zero here next week. Coyote hunting in the winter I’ve never had issues with srp…. I run cci no.400’s in my 6 arc and 223
Not sure. I was running varget at first than switched to bench mark. Never an issue.
My 223 never had any problems below zero.
Varget is faster burning than N555 and a much smaller case.
I bet you staball would be fine. I’ve been running it below zero in my 7Saw with cci 450. Never had an issue either.
I wouldn't use LVR or CFE223. They are a little bit too fast of burn rate. The N550/555 or H4350/RL16 class burn rate will maximize your velocity even with bullets in the 60-69 weight grain class.
I do have some N555 but haven't tried it yet under the Nosler 64's. I will likely give this a try soon... Hornady load data lists a top velocity for 62 gr bullets in the 3850 range, and that is SMOKING.
You may be OK with SRP's in smaller volume cases like 223, but there is a very high chance for ignition issues particularly if using charges > 40 gr in very cold weather no matter what powder you run. I would without question use LRP cases.
What do ignition issues look like? Is it just the round not going off despite a good primer strike?
Worse. It goes off after a 0.1-0.2 sec delay. Feels super weird and definitely affects accuracy.
Hang fires, get below 38 grains of h4350 or rl26, even in warm temps in a 22 creed and I get the split second delay.
Pin goes whack-huh-boom
An update for some N555, N560, N565, Superformance, and Magnum loads. I did a combination of ladders as well as some 3 shot groups. Of note cratering is not very reliable for pressure as I have a stock Rem 700 action with a non-bushed firing pin. The OAL was 2.338 for 64 BSB (Nosler 64 bonded) and 2.610 for 80 ELDX. Temp was 35 degrees and on/off rain. No ignition issues.
64 BSB and N555 was a disappointment. Velocity was only OK at 3490 at near starting loads of 44.5 gr, and pressure was obviously high with an ejector mark. Had to stop ladder.
80 ELDX/Superformance had good velocity with 3220 @ 43.4 gr. No pressure.
80 ELDX/Magnum was 3180 @ 48 gr. Some slight cratering.
80 ELDX/N560 was 3200 @ 44 gr. No pressure.
Tried some 3 shot groups with 80 ELDX/N565, with 44.5, 45.0, 45.4. All of these were quite heavily compressed, and also HOT. All had at least somewhat hard bolt lift. 45.4 was ave 3210, but w/ejector mark and cratering. Accuracy was OK
3 shot groups with Nosler 64 BSB/H4350 were much better, with 42.5, 43.0, 43.5. Very slight cratering at 43.5 but easy bolt lift and no ejector marks. 43.5 was ave 3575, and very accurate.
Was very surprised by the N555 results. I feel N565 is a little too slow for the 80's. Going to stick with H4350 for the lighter bullets, and try some groups w/N560 and Superformance. While temperature sensitive, I am not afraid of ball powders as I have had excellent results from them in other calibers (H335 is an all-time favorite in 223 for me).
64 BSB and N555 was a disappointment. Velocity was only OK at 3490 at near starting loads of 44.5 gr, and pressure was obviously high with an ejector mark. Had to stop ladder.
80 ELDX/Superformance had good velocity with 3220 @ 43.4 gr. No pressure.
80 ELDX/Magnum was 3180 @ 48 gr. Some slight cratering.
80 ELDX/N560 was 3200 @ 44 gr. No pressure.
Tried some 3 shot groups with 80 ELDX/N565, with 44.5, 45.0, 45.4. All of these were quite heavily compressed, and also HOT. All had at least somewhat hard bolt lift. 45.4 was ave 3210, but w/ejector mark and cratering. Accuracy was OK
3 shot groups with Nosler 64 BSB/H4350 were much better, with 42.5, 43.0, 43.5. Very slight cratering at 43.5 but easy bolt lift and no ejector marks. 43.5 was ave 3575, and very accurate.
Was very surprised by the N555 results. I feel N565 is a little too slow for the 80's. Going to stick with H4350 for the lighter bullets, and try some groups w/N560 and Superformance. While temperature sensitive, I am not afraid of ball powders as I have had excellent results from them in other calibers (H335 is an all-time favorite in 223 for me).
My understanding of N555 is that it is a similar but slightly slower burn rate to H4350, which should be perfect for lighter bullets. If it over-pressures before max with lighter bullets that would seem to indicate to me that it is not optimal for heavier bullets.
N560 seemed absolutely perfect for the 80's and my ladder went up to published Hornady max without any pressure at all and better velocities.
N560 seemed absolutely perfect for the 80's and my ladder went up to published Hornady max without any pressure at all and better velocities.
Is there a definitive difference in durability between Alpha, Peterson, and necked down Lapua SRP brass in the 22 Creedmoor?
Not 100% sure but I do have written down that Peterson has less capacity than the rest? Alpha OCD brass seems to be very well received. Lapua is Lapua.
New build on Precision 737R with a Stuteville Precision 20" Bartlien Carbon Fiber barrel. It's in a Magpul 700 stock now but i intend to put it in a graphite stock. I'm shooting suppressed with a Gemtech Dagger. All I've shot so far are the factory Hornady Match 80gr ELD-M and Hornady Precision Hunter 80gr ELD-X. The ELD-Ms are shooting better groups than the ELD-Xs. I'm using them for initial barrel break-in, shoot, clean repeat, so i haven'tgiven them a fair chance.
I have 100 pieces of Alpha SRP brass prepped and an starting loading tonight. I intend to start with the Hornady ELD-VT bullets, the try the Berger 75-80 grain bullets.
This is primarily intended as a coyote gun.
Finally getting settled.
24" Shilen Ratchet 1/7.5 twist
Rem 700/chassis
80 ELDX
44 gr N560
2.610 OAL
3250 fps, SD 6
Alpha LRP brass
Consistently in the 0.4-0.6 MOA group range for 5 shot groups.
Moderate load with no pressure signs. Hopefully stays that way with hotter weather.
24" Shilen Ratchet 1/7.5 twist
Rem 700/chassis
80 ELDX
44 gr N560
2.610 OAL
3250 fps, SD 6
Alpha LRP brass
Consistently in the 0.4-0.6 MOA group range for 5 shot groups.
Moderate load with no pressure signs. Hopefully stays that way with hotter weather.
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