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Old October 22, 2012, 07:51 AM   #2
Senior Member
Join Date: October 17, 2006
Location: TX
Posts: 513
The 400s are regular primers. The 41s are "military" primers that are harder and designed to preclude slam-fires. They usually cost more. I use the 400s. They work fine and I've never had a slam fire.
If you want to shoot...shoot...don't talk! Tuco

USAF Munitions 1969-1992
RVN 1972-1973
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