300 Blk Pistol: Miss Placed Gas Port??

arrowshooter

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So I am having an ongoing issue with copper buildup on the bolt tail and inside the BC that has been causing some issues. The gun does run great and right off the bat the brass is going to 3:00, but after 5 or 6 rounds they start heading south to about 5:00. After 150 - 200 rounds I get home and the bolt has cooled off and seized up which takes some work to get apart and cleaned out. I have been reading that a gas port drilled in the land can cause this type of issue with copper and am wondering if anyone else has experienced this?

For your viewing pleasure (got this with my cell phone):

Gas Port.jpg
 

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