The Vhit manual has N320 at 3.9-4.6 gr in 38 SP and 6.4-6.9 in 357 mag behind a 145 gr bullet. Lyman has 2.9 to 3.5 gr in 38 SP behind a 148 gr bullet.
This is why powders like N32C , Unique and Red Dot are popular amongst gallery rifle shooters. They have a larger volume per grain than other pistol/shotgun powders. I find that they meter really accurately as well. I throw my powder in an old Redding thrower with a competition dial on it and its superbly accurate with Red Dot.
Donald
The Vhit manual has N320 at 3.9-4.6 gr in 38 SP and 6.4-6.9 in 357 mag behind a 145 gr bullet. Lyman has 2.9 to 3.5 gr in 38 SP behind a 148 gr bullet.