Howdy. Yep, i'm new here! Anyway i traded an ounce of gold for a 300 wsm R1 NRA gun. I mounted a varyx3 on it and shot it for the first time yesterday with winchester bal tip 150gr. It did ok for an auto, being i was not on a bench. The gun had never been shot, but after the 10th shot things got wierd. It stovepiped a lot and was all over the place. I brought it home and stripped it, cleaned the bore, and the piston. It wasn't that bad. So then i went to the bench and loaded up the 20 rounds i had shot earlier. Well, when i put the first bullet painted to find seating depth, it wouldn't go in. I called my old man and asked him what i did wrong. He asked if i had bought rcbs dies. Yep. i did i told him. He said take em back if you can. You need redding dies or any other make of dies. Rcbs makes no small base dies for that caliber. So i'm just wondering what could cause this gun to jam being new. I did oil all the parts before i went out. Thank you for any help. joe.