Black dog gunworks race gun. Just getting it out for the first time and trying some new 9mm major loads through it. The stronger the load the less the recoil. I ran loads from 900fps to over 1500fps through it. Most of the primers where all flattened when I examined the brass. I've heard a lot of people have a hard time getting a 9mm major gun to run very well. I have around 600 rounds through this one and didn't have one problem other than the squib.