02-11-2014, 08:03 PM
LRRPF52 Wrote:That mark is coming from something during a rotational movement of the cartridge, it appears, probably from the barrel extension, but I would have to have it in hand to tell. You need to keep it from contacting the extension during insertion and extraction.
Don't use a magazine. Drop the cartridge into the chamber. Carefully close the bolt on it.
Extract it while keeping your index or pinky finger in the ejection port so the ejector can't push it into the extension teeth. Let it fall from the action, then inspect.
Here is the other thread: http://www.65grendel.com/forum/showthrea...#post86529
He definitely is seeing excessive pressure signs when firing the rifle:
Marks are all the way around. Not just one. And appears to be two different levels. Did level best keeping this one of the extension. Short on time lately so just one pic for now. Same marks all the way around.
Sorry about this whole two threads deal...
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