Now i know i could've looked this up, but there's a interesting story to this. My uncle owns a Merwin & Hulbert revolver, which he traded a polish made AKM. Now the story when is my grandpa Guy Dulllknife was visited by some guy around my age or 5 years older and while talking to him, the guy gave my grandpa his great great grandpa's revolver to him, the M&H. So my grandpa likes it, but talks to my uncle (who just married my aunt but easier to call him uncle) and he wants to trade the revolver to my uncle for his AK, which he gladly does. Now fast forward a few days, I go over and shoot my navies with him, he asks if i wanted to shoot the M&H and i gladly say yes. So its chambered in 44wcf and he has a box of Ultramax ammo, I became cautious at the moment, but it shot which should calm every nerve in me. But i'm worried that he'll go shoot it and it blows up on him because we both don't know if it was made for smokeless or not. So what do you guys think?