I have used the Velocitors in my pistols and noticed that they are a little harder on the recoil, and have heard rumors that the heavier slug is making for increased wear on semi auto carbines. I let my "Boss" carry them in a old H&R I won in a poker game, and dont doubt what the outcome of 9 rds going downrange would be. I carried a 22 for years where I worked as it was about all I could sneak in, and wouldnt feel undergunned if the need rose.