I took my 91/30 out for the first time to shoot it. I got 4 out of 5 rounds downrange and the casing stuck. I was unable to cycle the bolt until I got home with a little friendly persuasion from a rubber mallet to the bolt. When I got the bolt open the casing was stuck. I was able to get it out bit don't know what caused this. Did I not clean the barrel out enough? Any thoughts?