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The primers shows pressure signs cause by a short chamber in 45 acp, 1911 type firearm. As the action opens the high primer gets primer wipe. A gun smith corrected the chamber problem with a reamer. Not sure i buy this as the cartridge headspaces on the case mouth. Not sure how it could build pressure this way as the bullet is not trapped/ crimped into the chamber like a bottle neck round in a bold action rifle. The 45acp short chamber would hold the action open a tiny amount but still fire if the disconnector was not activated. A bulge might appear near the head if pressure was high. Very Strange.

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