POWDER = 4.6 GRAINS UNIQUE (CAUTION, CLOSE TO MAXIMUM PRESSURE RATING) BULLET = 158 GRAIN Z-CAST LEAD RN OR LEAD SWC. PRIMER = WINCHESTER SMALL STANDARD PISTOL PRIMER SPEED = 850 FPS SOURCE = HORNADY HANDBOOK OF CARTRIDGE RELOADING THIRD EDITION NOTES = I HAVE USED THIS ONE FOR YEARS. SLOW MOVER BUT VERY ACCURATE IN MY COLT TROOPER AND PYTHON. VERY LIGHT RECOIL. MY STANDARD ROUND IN MY CARRY GUN.