Be careful -- low-volume ratio loads can detonate. Mangement not responsible for load data. Use at your own risk.
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I’m looking for good starting load preferably with n320 or n340. I also have some clays, autocomp, power pistol, be-86 and others. Use will be in supprressed glock 17 and various subguns/PCC’s. Vihtavuouri has data for 147 XTP with COAL of 1.142. XTP projectile length is .025-.030 shorter than HST so if I just add the difference I’m over SAAMI max with the HST. My computer just s--t the bed so no quickload until new one arrives. I’m inclined just to start with 3.9 grains n340 and COAL of 1.165 and see what happens.