coltcco45

A few months ago I purchased a sport II to be used for sporting clays.I have had numerous cycling issues with this gun.The first problem is this the gun snaps on a live round and dosen't fire,upon inspection of the round I find the primer is hardley dented at all. I inspected some of my spent hulls and discoverd that the firing pin is not really punching the primers that hard.The next problem is that the gun fires the shell in the chamber then the shell in the magazine is released onto the loading gate the spent shell is ejected but the bolt hangs on top of the shell in the loading gate causing it to jam. I have been shooting 2 3/4 inch 3 drams powder 7 1/2 shot. is this shell not powerful enough to make this gun cycle? I have run about 500 rnds. through it.