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Old June 23, 2007, 06:27 PM   #4
James K
Member In Memoriam
 
Join Date: March 17, 1999
Posts: 24,383
Boring out the barrel on an M1 can cause problems due to the early drop in gas pressure. And it has to be done carefully or it can make things worse instead of better. It is not a hand drill job.

Jim
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