22GT load data
- Thread starter Krob95
- Start date
Hmm not sure. I shot 95 SMK with H4831sc 37.7gr gave me 2983 SD3 / ES 8 out of a PVA 26" Osprey 1-7
Honestly, H4350 was not at the top of the list of the best powders I tested in my two 22GT barrels with 90/95gr bullets.
N550 is my go to and the top of my list.. 34.5gr 3139 with 90smk SD2/ES6 0.1's @ 100yds... Every charge weight I tested from 34.3 - 35.1gr was sub half moa
New barrel is a Bow4 contour(essentially a 1.200" shank 3b) Hawkhill 7.5tw finished at 22" and cut with the Alpha 120fb reamer, tl3 tenon.
Load info:
Formed alpha ocd 22gt brass, 33.5 N150(cool burn) 80 eldm, cci450
Inital Velocity: 3140, after 65 rounds: 3185
No psi signs.
ES of 5 shot groups on avg: 20-30, not great, will likely move to H4350 or RL15.5 after break in, with 85.5 Bergers.
I planned to shoot lighter bullets with the short barrel for velocity purposes, hence short freebore. I may throat it, as the 77tmk has a very long bearing surface. 85.5 Bergers, 80/75 Eldm sit very well in the neck with the short freebore. The 77tmk, 88 eldm and 90 atip all have maybe 20-30k of seating depth adjustment before the bearing surface is going below the neck shoulder junction.
Start up load, 33.5gr N150 with 80gr eldm, I have approx 65 rounds on the barrel and has speed up about 40fps thus far, with no cleaning, other than scrubbing out the chamber and barrel after receiving it from the smith.
Velocity is currently around 3180 and it's shooting very well. I loaded up 100 rounds, first 15 rounds were just firing all the dummies that I made to find lands if possible bullet candidates. I started with a seating depth test on the 80 eldm -10k to -73k jump in 007 steps. The barrel is shooting very well this far, 5 shot groups averaging half moa, some in 3s and 4s, others in 6s and 7s. The -10 group(not in picture) and -38/-45 groups look very good. I'll likely seat the remaining 50 rounds to -40 to finish inital break in following a barrel scrub. Attached target is 1/4" grid.
Load info:
Formed alpha ocd 22gt brass, 33.5 N150(cool burn) 80 eldm, cci450
Inital Velocity: 3140, after 65 rounds: 3185
No psi signs.
ES of 5 shot groups on avg: 20-30, not great, will likely move to H4350 or RL15.5 after break in, with 85.5 Bergers.
I planned to shoot lighter bullets with the short barrel for velocity purposes, hence short freebore. I may throat it, as the 77tmk has a very long bearing surface. 85.5 Bergers, 80/75 Eldm sit very well in the neck with the short freebore. The 77tmk, 88 eldm and 90 atip all have maybe 20-30k of seating depth adjustment before the bearing surface is going below the neck shoulder junction.
Start up load, 33.5gr N150 with 80gr eldm, I have approx 65 rounds on the barrel and has speed up about 40fps thus far, with no cleaning, other than scrubbing out the chamber and barrel after receiving it from the smith.
Velocity is currently around 3180 and it's shooting very well. I loaded up 100 rounds, first 15 rounds were just firing all the dummies that I made to find lands if possible bullet candidates. I started with a seating depth test on the 80 eldm -10k to -73k jump in 007 steps. The barrel is shooting very well this far, 5 shot groups averaging half moa, some in 3s and 4s, others in 6s and 7s. The -10 group(not in picture) and -38/-45 groups look very good. I'll likely seat the remaining 50 rounds to -40 to finish inital break in following a barrel scrub. Attached target is 1/4" grid.
Has anyone had any issues with 7 or 7.5tw for 90gr A-Tip or 88gr eldm?
Will be in 18 and 16.5" barrels.
Will be in 18 and 16.5" barrels.
Idk about issues...but I I had way more consistency and ease of working up a load switching from 7 to 7.5 twist.. 26" barrel...
No issues with them in 7tw 219 bore barrel.
Found a charge that shoots well in both of my Bartlein 5R 1:7 barrels. Both are 20” barrels, one an M24 and the other a 3B.
35.6 gr H4350 behind a Berger 85.5 shot the .216” group out of the M24 contour and the same charge behind the 88gr ELD-M shot the .452” group from the 3B contour. Four of the five in the 3B group went into .127.”
John
35.6 gr H4350 behind a Berger 85.5 shot the .216” group out of the M24 contour and the same charge behind the 88gr ELD-M shot the .452” group from the 3B contour. Four of the five in the 3B group went into .127.”
John
Not at all. I haven’t really cleaned any brass yet on my 22GT because of round count to break in the barrel, but haven’t run into any issues at all with respect to chambering new brass. I had it cut for the Alpha brass as well.
I use Alpha brass in chambers cut with an Alpha reamer and it’s pretty snug, but not so much that I have any issues with bullet release.
John
This is in the body taper. 22gt reamer seems to be .460 at shoulder where 6gt reamer is .261. And if the 22gt brass is snug around the body.
Not the base though. Checked that. It's contacting in the middle web area.
Which is how you end up with clickers. Body or base contact.
I’m using an RCBS Matchmaster 6GT die and am not having any issues with clickers.
John
I chambered with the bolt, but use the brass as a dummy rd, to test for jam......no issues at all.
I found my best loads at 37.4gr of N555 with the 85.5gr Bergers with SD of 4 and the 37.2 has an SD of 5 at 37.2gr of N555.
I'm guessing that is the best node since I was stacking rds at 500yds with a 5" plate.
I'm guessing that is the best node since I was stacking rds at 500yds with a 5" plate.
35.6gr H4350 behind 88gr ELD-Ms just flat works in my .22GTs.Found a charge that shoots well in both of my Bartlein 5R 1:7 barrels. Both are 20” barrels, one an M24 and the other a 3B.
35.6 gr H4350 behind a Berger 85.5 shot the .216” group out of the M24 contour and the same charge behind the 88gr ELD-M shot the .452” group from the 3B contour. Four of the five in the 3B group went into .127.”
John
John
I‘ve seen folks using R26, so thought I’d ask. Anyone who’s actually tried it?
John
Close to RL26 (148) vs H1000 (149) on the burn rate chart.
Was getting low on my keg of RL26 (before finding Triple Nickel).
Ran a velocity test of 34.7 thru 36.2 ( S/Ds were trash on the low end).
36.2 gr was S/D 3, Spread of 8 and average Velocity 2910 (25 inch barrel And 88 ELD-M).
Only got so-so results at distance and for me it wasn’t RL26 (or a decent sub) so moved on…
Found another keg of RL26, I’m good…
Was getting low on my keg of RL26 (before finding Triple Nickel).
Ran a velocity test of 34.7 thru 36.2 ( S/Ds were trash on the low end).
36.2 gr was S/D 3, Spread of 8 and average Velocity 2910 (25 inch barrel And 88 ELD-M).
Only got so-so results at distance and for me it wasn’t RL26 (or a decent sub) so moved on…
Found another keg of RL26, I’m good…
Contemplating running the 22GT for PRS with 95gr SMK or A-tips in the 3050 fps range.
Is anyone running this setup and do you have to clean between days for 2-day matches to keep the barrel from speeding up?
How much speed up can be expected between 100 rounds on a cleaned/fouled broken in barrel?
Any reason this isn’t a good idea other than less time to spot shots?
On paper it looks really good.
Is anyone running this setup and do you have to clean between days for 2-day matches to keep the barrel from speeding up?
How much speed up can be expected between 100 rounds on a cleaned/fouled broken in barrel?
Any reason this isn’t a good idea other than less time to spot shots?
On paper it looks really good.
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I think you'll get more responses to this question if asked in the bolt action or competition shooting forum.
My second 22gt barrel is more varmint/utility rifle, 120 freebore, 7.5tw 237 bore hawkhill finished at 22" in Bow4 contour(small shank 3B essentially). It's cut to tl3 tenon but running it on one my origins with HLR recoil lug. Ultra7 supressor.
33.2gr N150 with 80eldm at 40k jump, they usually run 3190-3200. This 5 shot group at 300y is tiny, but es is crap!
33.2gr N150 with 80eldm at 40k jump, they usually run 3190-3200. This 5 shot group at 300y is tiny, but es is crap!
What are the recommended primers for 22GT, a buddy of mine is jumping into the deep end with a 22 GT. He hasn't done any reloading yet so I'll be teaching proper procedures while we work out the load for it. He was asking about primers and I didn't know if it was necessary to use 450's over 400's. He'll be starting out with 88 ELDM's
I had a 20” 22 gt. Shot really well with 40 gr of n555 and 75 eldm. Also shot well with 39 gr of n555 with 85.5 Berger’s.
Thank's much! General velocity? Doesn't need to be precise, I'm thinking shorter than that, not a long range competition gun, starter gun for youngster that may have potential.
That was my thought but figured I'd ask, I've run both small and large in my 6.5 CM without any difference I could see. Thanks
I've have several cases of 450s, that's all I run in br, bra, gt, cm cases, no issues even in cold weather and always shoot pretty dang good! I've never even tried another srp.
Srp is fine I’ve shot br4’s in -36f with 22 cm all night in a thermal hunt this year and everything was fine. My brother was using 450’s in a .204 and never had any issues either. Br4 is all I’ve ever used in the 22 cm from 100f to -36 and never had a problem. With lone peak and impact actions.
Kinda funny you mention the br4. I did a large primer test on a 65saum that was running 57.5gr H1000 and 135 jlk at 2940 from a 20" barrel with 210M. I tried br2, cci200, 210m and 215M. The br2 had the highest avg velocity of all tested. I'd be curios if you tested the same exact load with cci450 and had a noticeable velocity variation.
I just used a regular .308 alpha 10rnd mag with mine and had no issues. Actually fed better than my .22 creed ammo in my guns.
Padom, your load development data was on the money!
22GT. Berger 85.5 Hybrid, CCI450, Alpha brass 1x fired, N550 34.3gr. Loaded .050” off the lands.
ARC CDG, PVA 22GT prefit, 26” 1:7 twist. 3125fps. SD 8.6 ES 29
Just shot it in a match this weekend. Took 4th out of 69. The rifle and load did not hold me back.
22GT. Berger 85.5 Hybrid, CCI450, Alpha brass 1x fired, N550 34.3gr. Loaded .050” off the lands.
ARC CDG, PVA 22GT prefit, 26” 1:7 twist. 3125fps. SD 8.6 ES 29
Just shot it in a match this weekend. Took 4th out of 69. The rifle and load did not hold me back.
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I’m at 2996 fps same Alpha OCD brass. Still have room in the case, but that was the most consistent and widest node I had. Just ran up 150 more rds yesterday.
Would work with light bullets. I've had success with N150 accuracy wise with 80gr eldm, 33.2gr at 3190 from a 22", case fill is low and I'm not getting acceptable es/sd. Will likely retune with a slower powder. I have good luck with N150 in br variants giving good spreads, but hasn't been the case here.
H4350 has done well with heavies for me around 3100fps. A friend uses 4831sc at 3180, he likes it spicy tho!
