22-250 AI
- Thread starter AP2020
- Start date
White Eagle
Silver $$ Contributor
if I want an 22-250 ai
I shoot my Swift
I shoot my Swift
Ackman
Gold $$ Contributor
I’ve had several of them. Over 1000 casea firefomed, all with 50 gr bullets on varmints. Fireforming was not “fireforming”, it was shooting at velocity faster than a std 22-250 and with the same accuracy of a formed case. A win-win…..fillers waste time and powder/primers, don’t group well, and aren’t effective on varmints.
nakneker
Gold $$ Contributor
I was gonna comment much a long the same lines, I’ve had two 22-250 AI Rifles. Great cartridge and I had great accuracy from my fireform loads. Just makes it easy. The other benefit I like from the 40 degree shoulder is the brass doesn't grow near as much, very little trimming needed for several firings.
AckleymanII
Gold $$ Contributor
In my 12 and 14" twists with very short freebore, I run 55s with 44.5g of Win 760 and AA2700 burns a tad cooler with the same load, 4050 fps. Raven Rock has Sierra 55g BTPH on sale now for $139 per thousand, killer deal. I have very accurate loads with IMR 4320 and Varget but they are rough on throats at 37-38g shooting bug holes also.
In a 27" Hart 12T with zero freebore, I made a powder funnel with a 12" drop tube. With 47g of my lot# of Win 760, I shot the 50g Nosler ballistic tip at 4200 fps with less than 7 fps SD, tiny groups were an understatement.
ON some of the really tough Mexican coyotes, I went with a 60g Berger HP, and this bullet is worth building a rifle around with 37g of the lot# of Win 760 that I have on hand at 3700+ fps, bug holes abound in the zero freebore chamber. This 60g Berger load is a tremendous killer on coyotes at some distance, and I actually shot a bob cat in half while it was sitting on a pond dam looking at fish at a distance around 120 yards.
In a 27" Hart 12T with zero freebore, I made a powder funnel with a 12" drop tube. With 47g of my lot# of Win 760, I shot the 50g Nosler ballistic tip at 4200 fps with less than 7 fps SD, tiny groups were an understatement.
ON some of the really tough Mexican coyotes, I went with a 60g Berger HP, and this bullet is worth building a rifle around with 37g of the lot# of Win 760 that I have on hand at 3700+ fps, bug holes abound in the zero freebore chamber. This 60g Berger load is a tremendous killer on coyotes at some distance, and I actually shot a bob cat in half while it was sitting on a pond dam looking at fish at a distance around 120 yards.
When did Hornady start making these?
Beeswax helps to create pressure to fireform the brass.
AP, that was a good video. You pointed out the better case life and I can see that.
I would like to know if you load both rounds for rifles set up the same way as far as leade, twist rate and barrel length, all things equal and loaded to the same pressures, how would the max velocities compare?
I have not seen the diff in case capacities between the CM and 22-250AI either.
Thanks
I would like to know if you load both rounds for rifles set up the same way as far as leade, twist rate and barrel length, all things equal and loaded to the same pressures, how would the max velocities compare?
I have not seen the diff in case capacities between the CM and 22-250AI either.
Thanks
Thank you.
I do not have access to a 22 Creedmoor, so I will have to rely upon those folks to chime in!
I have searched and not found any information pertaining to 22 Creedmoor cases stretching after firings. I would imagine with it's 30° shoulder angle, case stretching would have to be commonly seen.
S&sprecisionTx
Silver $$ Contributor
Why not instead of fire forming just sighs down some 22 cm alpha brass SPR and trim it to length it's been working great for me and my guys down here
I will definitely do that! Thank you.
No hate, just a better alternative since you are saving a large rifle primer ( use large pistol primer), a healthy dose of slower burning powder (use 12gr. of Bullseye), and an expensive bullet (use beeswax/dental wax).
L.Sherm
Silver $$ Contributor
Thats my point, load them up go shoot coyotes, sage rats etc whatever you want just like any other cartridge no need for beeswax.
Will beeswax shoot like these fireforming loads, Hell alot of guns with fireformed brass wont.
Attachments
6MMsteve
Gold $$ Contributor
False shoulder, bullet, powder, done, I myself will never do fireforming with anything but false shoulder and standard load, the mess and time are just a headache anymore, I use to use CM, Cotton, 10 grs unique or bullseye.... but false shoulder and trigger time is mucho better if this makes any sense
L.Sherm
Silver $$ Contributor
I can see false shoulder in some cartridges like the Dasher but on a AI a properly set up chamber should have about .004 of crush. The targets above were just loaded with .003 nk tension and .010 into the lands and load worked up just like any other on my 20PPCAI I do the same on my 20BRA
D Coots
Silver $$ Contributor
Right....When I fire formed my my 22/250 AI the standard cases shot well. Absolutely no reason for me do do anything different.
Post your results with the 7 twist and 75 Hornady. I had blow ups using my 7 twist with 75s. I had to jump to an 8 twist to entirely end the bullet blow ups. I now shoot the 75/80 ELDM bullets. They function flawlessly now. Hopefully you won't have the same issues. Not sure if it was the ratchet rifling or fast twist that causes the blow ups but guessing the 7 twist was too fast.
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