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Old July 10, 2011, 11:03 PM   #7
Ralph Allen
Senior Member
Join Date: January 21, 2007
Posts: 416
I have a couple of boxes of 300 grain JHP and JSP that I tried in a 45 colt Marlin. They don't group very well compared to lead 250 grain bullets. My rifle just likes the lead bullets better due to being .003-.004 larger than the jacketed bullets. I, like Mal H have used standard primers for all those so called magnum powders, and they work just fine.
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