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Old December 29, 2013, 07:17 PM   #2
2ndtimer
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Join Date: October 9, 2004
Location: Kennewick, WA
Posts: 292
I have never used IMR-4320, but I have loaded 55 gr bullets from Hornady, Winchester, Remington, Speer, Nosler, Sierra and Berger, and I have never noticed any particular difference in loading data. The old mantra, start low and work up gradually watching for pressure signs always applies. When you reach the accuracy level you desire and the velocity is acceptable, you are done. If you don't, it is time to try another powder or bullet and start over. Have fun.
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