I have a winchester model 70 300 WSM. It is just the standard model 70 with a 24 inch barrel and a synthetic stock. I have used some federal premium nosler partition bullets and hand loaded some barnes tsx and ttsx and some nosler accubonds. from these bullets I'm getting like 4"+ groups at 100 yards. I am noticing that when bolting a bullet into the barrel, whether from the magazine or not, it gets most of the way into the barrel smoothly then the case catches the top of the chamber or barrel and I have to almost force it into the barrel. After I shoot the round and eject the case, or just eject the bullet without firing, there is noticeable scratching on the case from when I had to force the bullet in. I dont know if this is causing the inaccuracy or not. My question is what should I do? Just keep trying different ammo or have something done to the gun? Should I have a gun smith check out why I am having to force the bullet into the barrel and what is causing the scuffs? I am on a limited budget so I'm looking for the best, cheapest fix to this problem. Thanks in advance!