Almost two years ago I bought a new Remington model 750 carbine in .308. I have had the same problem with it ever since I first fired it. When there is a cartridge on the right hand side of the magazine(one or three cartridges in the mag) as the bolt tries to cycle back, either manually,or as the result of a fired cartridge, the lug on the bottom of the bolt deeply gouges the shoulder of the cartridge in the mag, resulting in a malfunction. I have tried Remington green box 150's, and Federal fusion 150's with the same results. The first fix I tried was a different magazine, and it still did the same thing. The rifle has now been back to the Remington factory four times, they claim to have replaced most of the moving parts in the rifle the first two visits there, and the last two times they tried to tell me there is nothing wrong with it, that it must be the result of "shooter error." What a crock. But it looks as though I may have burned my bridge with Remington though, I may have got a little hot with them. Anyhow, it seems that the magazine is not quite in the right location to facilitate reliable feeding. Does anyone have any suggestions? I would sure love to hear anything you can offer. By the way, with a Leupold vari-x 1 2x7 on top and 150 grain Remington factory ammo I get .75" groups, so I would really like to get this gun in working order.