Jim, the BR will be the most efficient, the 22Ch will be the fastest, but most short lived, the 250AI would be the easiest to form from the 22 big boomers.Planning on a 8 Twist 22 caliber and I have all of these reamers. 22 Br ,22-250 AI and a 22 Cheetah .
Which one would you choose and why ?
Thanx,
Jim