I was wandering if anyone could give me some advice on what to do. I have a brand new mossberg 835. Whenever i load shells into the magazine i have to force them in very hard. It will push the shell in about half way and then i have to push harder. Also the gun will then jam on either the second or third shot when a lot of shots are being made. I am using 3 in. winchester expert steel. I have tried some 3 1/2's but they are a nightmare to get in the magazine. What should I do?