Which Wilson trimmer holder for 22-250 AI?

[fat_46]

I'll be fireforming some brass for 22-250 AI shortly. Prior to fireforming it I want to insure my case lengths are correct. Will I need to buy both the standard 22-250 case holder for pre-fireformed brass and the 22-250AI for post-fireformed brass?


Thanks!

 

[brfun]

Yes you will need both to trim before and after. But as long as your unformed cases are not to long i wouldn't trim until after one or two firings as your length will change during fire forming. sometimes a large difference between formed cases.
Brian

 

[chino1969]

Yes you will need both to trim before and after. But as long as your unformed cases are not to long i wouldn't trim until after one or two firings as your length will change during fire forming. sometimes a large difference between formed cases.
Brian

I'll second this suggestion as your brass length will decrease some as you fireform in the Ackley chamber. Some of the length that was there will flow to the shoulder/neck area. Once your brass has formed to the Ackley profile, you will find that trimming is greatly reduced.

Lou Baccino
Chino69