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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
The PRC die "problem"
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<blockquote data-quote="Pdvdh" data-source="post: 2027342" data-attributes="member: 4191"><p>Hope this doesn't add to any confusion..., but here goes. I own two finish chamber reamers. 1) for my .338 Lapua Rogue, and 2) for the equivalent of the 30 Sherman Magnum.</p><p></p><p>I have barrels chambered with both of these reamers that have been removed from the actions. So I could easily measure the ID of each chamber at the breech face with 0.001" calipers. Both chamber IDs measure right around 0.001" larger in diameter than the 0.200" datum of the respective chamber reamer spec sheets.</p><p></p><p>I've never chambered a barrel blank, but it appears that the chamber diameter, after reaming and polishing the chambers with the common 320 grit surface, end up being about 0.001" larger in diameter than the finish chamber reamer OD spec'd at the 0.200" datum. Gunsmiths that chamber barrel blanks probably know this off the top of their head.</p><p></p><p>Just a curious engineer...</p></blockquote><p></p>
[QUOTE="Pdvdh, post: 2027342, member: 4191"] Hope this doesn't add to any confusion..., but here goes. I own two finish chamber reamers. 1) for my .338 Lapua Rogue, and 2) for the equivalent of the 30 Sherman Magnum. I have barrels chambered with both of these reamers that have been removed from the actions. So I could easily measure the ID of each chamber at the breech face with 0.001" calipers. Both chamber IDs measure right around 0.001" larger in diameter than the 0.200" datum of the respective chamber reamer spec sheets. I've never chambered a barrel blank, but it appears that the chamber diameter, after reaming and polishing the chambers with the common 320 grit surface, end up being about 0.001" larger in diameter than the finish chamber reamer OD spec'd at the 0.200" datum. Gunsmiths that chamber barrel blanks probably know this off the top of their head. Just a curious engineer... [/QUOTE]
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The PRC die "problem"
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