I have shot 3 different brakes from 3 different 300 win mag rifles. All were a 2-3 chambered brakes. 1) Big Maxi, 5//8 x 24, 3" long, 1 1/4" wide. 2) Big Chubby, 5/8 x 24, 4" long 1 3/4" wide. 3) Armalite V-block design, 3" long, 2" wide. The Armalite V-block had the least felt recoil. All...