64 BSB does indeed work well and will certainly hold up to 22/250 velocity, whether or not you get sufficient accuracy to suit you is another problem, but then it can be with any bullet, can't it?
I even got some factory 64 BSB ammo to try in my 8 twist Rem 600/Shilen .22-250. I want to see if they can get that bullet grouping better than I’ve been able to. Have yet to check that out. Other projects keep getting in the way. Any info on how factory ammo shoots?
DF
