For what its worth, I got my hands on some of these a few months ago and was frankly disappointed. I tried them is several different rifles ( if I recall, a Marlin bolt, a Ruger 10-22 and a Remington 797) and accuracy was disappointing. None of these rifles are what I would call tack drivers but regular CCI mini mags and stingers were far more accurate. Also (and I am attributing this to the extremely light ceramic (?) projectile) one of the semis would not cycle reliably using this ammo. I'll stick with the stingers........