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Remington 7400 bending case mouths


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Hey guys, a buddy of mine is having trouble with his 7400 (chambered in .270) bending case mouths. It's not terrible, but definitely noticeable at a glance. He also said it's accuracy has went downhill of late. I haven't shot it myself yet, but I've cleaned it (minus pulling the bolt and stripping copper from the barrel). Anyone have any ideas on what could be causing it to bend cases, and could that be related to the alleged degradation of accuracy? Thanks in advance 

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First thing to check is the barrel nut. If its not tight, it will shotgun the groups. Also the hand guard bolts are finicky in getting the hand guard to the right tension without much pressure on the receiver. Most of those bolts get swapped out for the swivel studded bolt. When tightened properly, there should be a tiny bit of forward to back play by way of original design of that double treaded bolt. Now these guns have very over pressured gas systems and simply don't do well at all as they get warm from as little as 3 rounds fired. As for the dinged case mouth, Some of these will do that out of the box. If this one was not known to do it before, scrub the gas cylinder and gas port extension. If the tolerance there has gotten fowled, that would speed up the bolt cycling speed making it a tad more violent on the case ejection. Don't forget to make sure the scope base is still tight also.

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