For a while I had two CZ 550's in 9.3x62, the rifle with a 23.6" barrel and the FS (full-length stocked) model with 20.5" barrel. One day I shot a bunch of the same handloads and factory ammo in both rifles, and the biggest difference in velocity was 88 fps, if I recall correctly, and most were MUCH less.
“Montana seems to me to be what a small boy would think Texas is like from hearing Texans.” John Steinbeck
