22GT
- Thread starter LVLAaron
- Start date
Alpha .169 shooting 88 eldm.
xswanted
Gold $$ Contributor
What kind of speed?
This is an interesting new cartridge. What kind of speeds and accuracy are you guys seeing with the 88 Eldms? A few targets and rifle pics would be nice to see. Thanks guys.
Paul
Paul
Boltfluter, Here’s a rifle picture and a cartridge and 88 gr Eldm picture. Not the best photos but yanked rifle out of safe and laid on reloading bench.
27” Lilja 3 groove 8 twist hidden under that sleeve/tensioner
Miky edge Game Hunter.
Don’t have any targets saved but if I do my part, which is getting tougher the older I get!, it ll shoot easy 3/8” groups at 100. We do most of our sighting in and target shooting at 300 yards and 1/2 MOA pretty normal if winds good.
Bulk of rifle use for LR Varmit shooting; marmots and some grd squirrels. Never played with numerous powders and bullets, just went with what was sitting around and it shot well enough for my intended use.
Fun cartridge.
27” Lilja 3 groove 8 twist hidden under that sleeve/tensioner
Miky edge Game Hunter.
Don’t have any targets saved but if I do my part, which is getting tougher the older I get!, it ll shoot easy 3/8” groups at 100. We do most of our sighting in and target shooting at 300 yards and 1/2 MOA pretty normal if winds good.
Bulk of rifle use for LR Varmit shooting; marmots and some grd squirrels. Never played with numerous powders and bullets, just went with what was sitting around and it shot well enough for my intended use.
Fun cartridge.
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Very nice! Thanks for sharing. I have to ask about the barrel "tensioner. What contour is under the sleeve? Very cool!
Paul
linebaugh
Silver $$ Contributor
I am running 3065ish depending on temps. This is out of a 30" barrel with a custom reamer that seats the beginning of boat tail at the neck juncture. I built it for PRS and can not actaully tell you what it is truly capable of for accuracy. I can tell you my benchmark is always 1" or better at 250yards, which was my zero when I was still shooting.
I don't have anything against the cartridge but I also do not have any extra excitement about it either. If I had a do over I would have stayed with the 22x47L
Resurrecting this old thread to share my results so far with the .22 GT. Did some more load work up on my .22GT. Once I found max, I concentrated on higher charges hoping to find accuracy with 88gr ELD-Ms at 3000fps or more from my 20" Osprey barrel. Alas, it was not to be. This barrel decidedly did not like any charges of H4350 greater than 36gr, grouping a bit over 1" with for 10 shots. I remembered back to when I was finding max, that four consecutive charges from 34 to 35.6gr all went into the same ragged hole so decided to try 35gr. Bingo! 35gr grouped 10 shots into .443" center to center. You can see ”flyers” at 6 o’clock and 8 o’clock in the group. By the time I was six shots in, mirage off the suppressor was significant. Had it not been for that I think I could have done even better. Eight of the ten shots are probably in the high .2s. Didn't chrono it but based on come ups at 900, velocity is about 2900. I had hoped for more speed, but I don't think 100fps is going to make or break a shot. Overall, very pleased so far.
John
John
I ve settled on 34.4 grs of IMR 4831 for 3030 fps. ( I have lots of imr4831 is why)
The gunsmith and other friend both using R23 at 35.5 grs and 3060 ish fps. Those were the nodes we found and we ran both powders up another 1.6 grs but better accuracy and ES, abs SD with lower charges.
As mentioned, we just get out larger cased 22 s if we ‘want more’.
The gunsmith and other friend both using R23 at 35.5 grs and 3060 ish fps. Those were the nodes we found and we ran both powders up another 1.6 grs but better accuracy and ES, abs SD with lower charges.
As mentioned, we just get out larger cased 22 s if we ‘want more’.
As expected, my barrel seems to be speeding up a bit as I approach 200 rounds. Yesterday the 35gr load averaged 2930. Checked the numbers and it is flatter and has less drift than a 123gr Scenar at 2940, and is even more fun to shoot.
John
I bought a reamer for the 22GT this past summer and decided to chamber myself a barrel before offering it to my customers. I love the 6GT and i think i Like 22GT better. Im shooting the 90 grain sierra match king and i really like the combination. I cant recall the powder i used but i can provide that info if anyone is interested. I have lots of notes and speeds written in my logbook. I have made several 1000 yard hits on steel with little effort using this combo. Lots of fun!! Lee
22 GT is my fav cartridge. I have it in a Heavy PRS rig shooting ~ 3150 & have ordered a Bartlein CF M24 for a lightweight fun rig. All I shoot is 85.5 LRHTs over h4350. My reamer was made off dummy rounds of Alpha brass & 85.5s + 0.020. FB = .087. Most run .120 to .170 freebore & have great success shooting 90 grain a-tips
Paul, here is 2 22 GTs. A heavy & the light. I just put the light one together a couple of nights ago. Thank you for recommending Alex. I always thought he would be too busy. I mentioned your name. He’s got me on list for a 6 BRA & is also going through my action to make sure all is optimized.
Lynn
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Excellent, glad it worked out for you!
Paul, I built a heavy prs rig with a Hawkhill MTU 26”’ 7 twist using a reamer I had built on a reamer I had made from Alpha brass & 85.5 Bergers. It’s a tack driver & easy to load for. I had a lightweight varmit rifle built with a Bartlein cf m24 7.2 twist using an alpha .120 reamer. I get accuracy & precision with it, but find it is more finicky than my heavy built with my reamer. In hindsight on the lightweight I would have went 22 br. Sure was a pleasure talking to you.
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urbanrifleman
Site $$ Sponsor
If one decides on a 7 twist, you hit 320,000 rpm at 3k. Which is terminal.
I suggest the 8 twist is plenty unless one wants to be content with 223 velocities.
I suggest the 8 twist is plenty unless one wants to be content with 223 velocities.
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