Welcome to the best Black Powder forum there is. I have a number of percussion cap guns that I love shooting. Shooting wise they are my favorite. I've always had an interest in the underhammer gun but never tried one. Someone on the forum always says keep shooting BP it is a blast. How true it is. Here in Iowa it's not going to get above zero degrees today but I don't care I'm going to the range. I'll have it all to myself.