Have a Marlin 1895 GBL. I have really enjoyed it till recently. I took it out shooting yesterday and 5 out of 10 rounds failed. The firing pin made shallow strikes. I thought I might have "short stroked" so I made a second attempt at each round. Two fired fine but three didn't. After the first two rounds I made sure I was closing the lever completely but it still happened three more times. This happened on my first box of ammo through the gun also. 4/20 rounds failed to fire that time but three of the factory leverrevolution hornady rounds didn't have powder in then. I figured the first time it was an ammo issue. This rifle has fired 100 rounds through it. Please help is it an operator issue or gun?