Well, in West By GOD Virginia the 17 HMR is the biggest round we use. If we think we need more bullet weight we just tape a bullet of the appropriate size centered over the muzzle. That way it doesn't increase recoil or muzzle blast. If we think we need more velocity we just yank the trigger, eject the brass and blow a shot of compressed propane down the barrel and then take aim before the bullet exits.
