Winchester makes a 130-grain flatnosed FMJ range load they call "Service Grade" which has ballistics similar to the Ball M41
.38 Special Velocity Tests, November 19, 2019, 50 degs. F.
Firearm:___________S&W Mod37_____S&W Mod12____S&W .38-44HD Remarks:
Barrel length___________ 1-7/8"____________2"____________4"
Cyl. Gap_______________ 0.008__________0.006_________0.006
Ammunition:
Ball M41 130FMJ RA66_____732 fps, 23 Sd__742 fps, 30 sd__832 fps, 31 Sd_Vietnam-era military for Airweight revolver
Ball M41 130FMJ WCC68___721 fps, 20 Sd__766 fps, 32 Sd__779 fps, 28 Sd_Vietnam-era military for Airweight revolver
Win. 130FN"Service Grade"_739 fps, 22 Sd__771 fps, 5 Sd__846 fps, 11 Sd_Current production "range" ammo
Avg. of 130 FMJ ammo__731 fps________760 fps_______819 fps
Standard Pressure Handload to Approximate M41 Velocity Safe for Airweight Frames
Speer 135GDHP 4.1B'eye__710 fps, 19 Sd__772 fps, 18 Sd__808 fps, 20 Sd_
Expands from the Model 12, but not from the M37. GDHP "Short Barrel" Needs >750 fps to expand in water jugs.
Attachment 276576Attachment 276577Attachment 276578