@James:
Use any book data for N320 that you have for 115 grain jacketed bullets, start at the lowest end. You can use the same OAL I used above, 1.075, but I’ve run these bullets as long as 1.10. Keep in mind, that their profile is not conducive to guns with a short throat if they are loaded long. As long as you start at the minimum charge, and test as you work up, you’ll be fine.
OAL: 1.075
Charge: 4.2 grains TiteGroup
Brass: New Starline
Test Gun: CZ75B Omega
Average velocity: 1147 (10 shots)
SD: 6
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