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Rifles, Reloading, Optics, Equipment
Reloading
Primer pocket truing
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<blockquote data-quote="MagnumManiac" data-source="post: 2630855" data-attributes="member: 10755"><p>Having shot F-Class for many years, drilling certain brands of brass with an incorrectly sized bit will ruin the accuracy of said case.</p><p>Lapua and Norma both use CIP sized flash holes that are smaller than US sized flash holes. When I started using Norma brass, I was de-burring flash holes with a Brownell's tool, it was enlarging the flash hole… another shooter pointed out the difference and I bought the cutter for the smaller flash hole and my groups at 600 shrunk considerably.</p><p>So, my take on drilling flash holes is don't do it unless you SEE that it improves something.</p><p></p><p>Cheers.</p></blockquote><p></p>
[QUOTE="MagnumManiac, post: 2630855, member: 10755"] Having shot F-Class for many years, drilling certain brands of brass with an incorrectly sized bit will ruin the accuracy of said case. Lapua and Norma both use CIP sized flash holes that are smaller than US sized flash holes. When I started using Norma brass, I was de-burring flash holes with a Brownell’s tool, it was enlarging the flash hole… another shooter pointed out the difference and I bought the cutter for the smaller flash hole and my groups at 600 shrunk considerably. So, my take on drilling flash holes is don’t do it unless you SEE that it improves something. Cheers. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Primer pocket truing
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