Yes, you can fire those caps in any Model One, in good condition, as well as the modern sub-sonic .22 shorts. At least I never encountered any problems doing that with good condition guns, but that's not a guarantee you won't. Accuracy is not part of the exercise, but you can probably hit a basketball at ten feet most of the time, if you are a good shot. I think Mark Twain was quoted once as saying that "If anyone ever shot him with one of those S&Ws Model Ones, and he found out about it, he would not be happy." - or something to that effect! Ed.