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Old May 3, 2011, 03:19 AM   #1
Ignition Override
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Join Date: February 18, 2008
Posts: 1,774
Why scrape burrs after neck-trimming?

Is it to allow consistent caliper measurement of the case length, or for other safety reasons? I realize that any internal burrs will scrape bullets and create asymmetrical aerodynamics (like a speed brake/spoiler panel partly extended on just one wing).
What is the main reason to remove External burrs?

My only reloading has been for 'British '303', but just deprimed and now trimming the first cases for 30-06 reloading.
It is LC M2 Ball, which will be used in the Garand (Service Grade, CMP).
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