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Old 02-05-2013, 19:26   #10
WiskyT
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Join Date: Jun 2002
Location: North Carolina
Posts: 11,764
0.403" is going to be close in a Glock. My mold drops the same size and I have to size them to get 100% chambering. This is with 40SW Glocks.

I don't know how accurate this is, and I forget where I read it, but when DuPont was broken up, they kept the single base powders and Hercules made double base powders. Herco was supposed to be a double base version of SR4756. There are SR4756 loads out there. I have used some in 40SW. You can use 40SW data in 10mm and you can use data for a heavier bullet for lighter bullets.

I'll check my old Hercules booklet to see if it has Herco loads for 40SW or 10mm.
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