I have a S&W 22A with a 4X Simmons on top, and it's a true tack driver. I shot about 25 squirrels last fall with it, and most through the head.

It will shoot pretty much hole in hole at 25 yards...and doesn't jam. Isn't bad to clean, either. I had a buckmark, and didn't like the cleaning process on that gun. Just me.......