I've got 2 of these barrels. both deadly accurate and fast. 17" pistol barrel will push the 40 grain pills at almost 4000. Had them faster with no pressure but 4k is spot on for accuracy. McGowan chambered that one and more than happy with it. Not sure of the rifle's make since it's a Remington 700 and swap meat barrel. Brass is easy to make and this cartridge is VERY easy on the brass. extremely fun to play with and a laser beam to 400. If I was buying one now and Jim Briggs had one or could get one, that's who I would deal with hands down.