To get close to .38 Spl. velocities when using .357 brass you need to increase the .38 load by 10-11%, not just 1/10 grain, to account for the larger case. For example, with the basically standard, old load of 2.8 gr/Bullseye/148 WC this would be 3.0-3.1 gr. Bullseye. It makes no difference if...