frontier gander,it sounds like he is talking about an old slow twist side lock if that is so it might not shoot anything but PRB well, that makes 75 yds about the fartherest it would have an exceptable amout of enegry and 100 about as far as you could expect decant accuracy,I have severaland they are fine for target and squrril and I have taken some deer with them but was unhappy about how far I had to track them and ended up building a 54 cal Hawkens with a 35.5 inch barrel now thats a real deer gun. Lee