I bought one of the 50 cal. double rifles. Been wanting one for a long time, and, finally made the jump! It has arrived and I am soooo pleased with its appearance. The question I have now, since I've had a chance to actually think about shooting it, is..what bullets do y'all (you all)think I can use without the second barrel load jarring loose when the first barrel is fired? I've been thinking about projectiles and figure I need one that will seat tight enough that its not going to vibrate away from the charge at the first shot. Any suggestions?