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Old August 16, 2010, 04:47 PM   #4
Senior Member
Join Date: February 25, 2009
Posts: 643
I tried it when I was loading hot 41 mags. The rounds with the fill had a slightly better velocity consistancy. this velocity advantage was in the neighbor hood of .5%. certainly not enough to warrant the expenditure or the extra time involved. I finished the test project and threw the excess poly-fil away.
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