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Rifles, Reloading, Optics, Equipment
Reloading
COL question
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<blockquote data-quote="rscott5028" data-source="post: 541843" data-attributes="member: 24624"><p>The Stony Point COAL gauge measures from a datum line on the ogive that's similar to a typical minor diameter in a bore for your caliber. </p><p> </p><p>SAAMI specs for COAL don't address that particular measurement so far as I know. </p><p> </p><p>Bullets vary by Mfg in the design of their ogive and bullets with a production Lot and within a box will also vary. Hence, COAL with one bullet as measured in this manner will be different from one bullet Mfg to another. </p><p> </p><p>Production rifles should be chambered with similar reamers. But, you will still have production variances there. Plus, headspace in production rifles may vary slightly. </p><p> </p><p>All of this can stack up to some pretty large numbers. </p><p> </p><p>The purpose of the Stoney point gauge is to find a relative starting point for seating the bullets in your rifle. Then, it's up to you to perform load development to come up with the ideal seating depth. </p><p> </p><p>I don't see a reason to be concerned. </p><p> </p><p>-- richard</p></blockquote><p></p>
[QUOTE="rscott5028, post: 541843, member: 24624"] The Stony Point COAL gauge measures from a datum line on the ogive that's similar to a typical minor diameter in a bore for your caliber. SAAMI specs for COAL don't address that particular measurement so far as I know. Bullets vary by Mfg in the design of their ogive and bullets with a production Lot and within a box will also vary. Hence, COAL with one bullet as measured in this manner will be different from one bullet Mfg to another. Production rifles should be chambered with similar reamers. But, you will still have production variances there. Plus, headspace in production rifles may vary slightly. All of this can stack up to some pretty large numbers. The purpose of the Stoney point gauge is to find a relative starting point for seating the bullets in your rifle. Then, it's up to you to perform load development to come up with the ideal seating depth. I don't see a reason to be concerned. -- richard [/QUOTE]
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