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22 250 AI freebore

Any suggestions for FB and neck diameter for a new reamer on 22 250 AI, shooting 69 gr Sierras or 75 gr A Max in 8 or 9 twist. 10 week wait with Dave Kiff, Manson and JGS have reamers in stock.
 
Areaone -

Howdy !

My wildcat .22-35 has case capacity a tad < .22-250AI.
I shot my wildcat .22-35 in a K & P 28" SS 1-8 5-groove. I used 75 "A"-Max exclusively, for both paper and varmint.

Neck wall thickness I used ( my reamers by Clymer ) was 10/thousandths. I went thinner on the neck' walls, when I re-barrelled to
the 1-8. This, after the original Hart 24" SS 1-14 5-groove had a chamber set-up for case necks 13/thousandths thick.

Can't give you an exact figure for the " freebore", which I left to the reamer maker'/riflesmith' discretion; in both instances.
I will say w/ the 1-8 barrel, I was runnin' the 75's boatails beneath the neck/shoulder junction ( wildcat has a .250" lg neck, 26* shoulder angle ). My most-accrurate load was 75 "A"-Max over 40.5gr AA3100, and Fed LR Match; for 3,420fps. Not the fastest load.... the most accurate ( field ) load. This load would be good for a clean-kill on "soybeanus digestus " @ 1,000; given.... a good hit.

You very well may not want to run a cartridge w/ the bullet's set so deep !

DK if any of that helps ?!?

With regards,
357Mag
357Mag
 
I've had several 22-250AI's. The tight necks are .250", the unturned are .255". Unturned neck shoots awfully well. My reamer has "0" freebore. With no freebore a 75gr VMax just touching the lands will seat to .150" below the neck/shoulder junction.
 
Areaone -

Forgot to mention... my rifle shoots best w/ bullets .002" off the lands ( all weights ).


Regards,
357Mag
 

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