I have (and love) a S&W 22A-1 Semi-Auto pistol, and I am wanting to shoot some rats with it. I have 2 barrels for it, one scoped and one not.

I was wondering if the shot will hurt the rifling in the barrel. I have shot the pellets for years out of a cheap H&R Model 929, and I have no idea if it has hurt it or not...I've never been able to hit anything with that particular gun anyway.

Any help?

Thanks so much.