I have a new 54 cal great plains. I have about 50 shots thrugh it w/no problems. Today I shot four shots and on my fith shot, it would not fire. The percussion caps would not bang. I tried several and some would go off and some would not. Then the gun finally fired. The next shot did the same thing but the gun would not fire. I went through about seven percussion caps, some would bang and some would not. The gun would not fire. Would this be a problem with my nipple maybe?? By the way I tried percussion caps from two seperate batches so I dought that they are at fault.