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Old December 5, 2009, 07:56 PM   #8
Unclenick
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Join Date: March 4, 2005
Location: Ohio
Posts: 16,723
No. You're getting more velocity out of the Norinco. Not being a Glock owner, the polygonal rifling didn't occur to me. I think that rifling and the use of a slow-ish (for caliber) powder are combining to cause the problem. I expect it is easier to drive one of these bullets into the Glock barrel. That will mean the problem is the Glock rifling isn't giving you as much resistance for start pressure as the Norinco. That means the powder won't burn as early or as completely as it does in the Norinco and the peak pressure will be lower. With that drop in peak pressure comes a drop in velocity.

The solution will be to increase the charge in the Glock a little or to move to something faster burning than HS-6. Universal will probably work well.
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