Originally Posted by YATYAS
Good questiom. Marine Corps M40 rifles are modified by Marine armorers. From my understanding, head space is a main factor in accuracy. I wonder if they mod the head space of each rifle to ensure the ammunition and chamber are a perfect fit.
I'm sure they have specs they machine to. The point is, they have a recipe for all rifles of the same caliber and it works. OMG they are accurate to well over a mile!
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