Quote:
Originally Posted by Bill Murphy
Apparently, there is some danger in ball powder (and maybe others) getting into the hole and causing some kind of pressure rise or detonation. I have no idea where we can read about this phenomenon.
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A method I have used in BPCR is placing a strip of newspaper over the primer hole before pressing in the primer, thus eliminating pressure & velocity variations due to unknown amounts of powder entering the open ended primer.