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Rifles, Reloading, Optics, Equipment
Reloading
Belted Headspace
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<blockquote data-quote="TR1Hemi" data-source="post: 2512919" data-attributes="member: 122752"><p>It's resolved. No I didnt "just" turn the barrel 1/8 of a turn in to make the barrel stamp line up with the stock better. But isn't that a coincidence? Really it began as a need to unprime some sketchy ammo (one was a fire formed 7mm case, with virtually no neck) that came with a used rifle. It was then that I noticed the primers backed out .011". Then came the realization that this was an oops rifle, maybe why the guy sold it. Brand new Peterson long brass, still chambers. Thus confirming this was an issue. A test fire of a primed piece of brass revealed zero primer back out. Another confirmation it "had" excessive headspace. Measurements of the belt depth in the barrel, and bolt face depth revealed that the machine work was perfect. It was either assembled poorly or been apart by a previous owner.</p><p></p><p>Now I didnt waste powder and primers on a questionable rifle, and I can proceed as if it was a new out of the box rifle.</p><p></p><p>Did you know the headspace on an M61A1 Vulcan 20mm cannon is controlled by depth micrometer measurements and adjusted with a stainless steel laminated shim?</p></blockquote><p></p>
[QUOTE="TR1Hemi, post: 2512919, member: 122752"] It's resolved. No I didnt "just" turn the barrel 1/8 of a turn in to make the barrel stamp line up with the stock better. But isn't that a coincidence? Really it began as a need to unprime some sketchy ammo (one was a fire formed 7mm case, with virtually no neck) that came with a used rifle. It was then that I noticed the primers backed out .011". Then came the realization that this was an oops rifle, maybe why the guy sold it. Brand new Peterson long brass, still chambers. Thus confirming this was an issue. A test fire of a primed piece of brass revealed zero primer back out. Another confirmation it "had" excessive headspace. Measurements of the belt depth in the barrel, and bolt face depth revealed that the machine work was perfect. It was either assembled poorly or been apart by a previous owner. Now I didnt waste powder and primers on a questionable rifle, and I can proceed as if it was a new out of the box rifle. Did you know the headspace on an M61A1 Vulcan 20mm cannon is controlled by depth micrometer measurements and adjusted with a stainless steel laminated shim? [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Belted Headspace
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