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Flash Hole Size

#53 = 0.0595”, works with the original 6BR & PPC flash holes, may be too small for cases like Lapua’s 308 Palma brass. I shoot that, uniform flash holes w/ K&M small primer tool @ 0.0625” or 1/16”.

I also uniform flash holes to 1/16", but I use a Sinclair flash hole reamer; it makes it easy to align and no power is needed - the whole operation is quick.
 

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