Realize that the 22/45 we were using had a red-dot on it and that's exactly how the shooting started. A few single shots, right into double hammers, and then 3-5 at a time with awesome accuracy. The fun factor on this gun lasted about 4-5 magazines for me and then I thought I was done. But when we had one more mag to finish off I jumped at the chance.
The 22/45 is one of those sneaky fun guns because you don't realize that you just keep filling another magazine and going again. And, since 22LR costs something like five dollars per metric shit ton, you can shoot all day for next to nothing.