My local supplier was out of federal 100 small pistol primers last trip. I picked up a supply of small pistol magnum primers(federal 200) and intend to use them for target loads in a 38 special. Using 3.4 grs of HP-38 and a Remington HBWC bullet. I figured to check the velocity against a regular primer and reduce the powder charge to get comparible velocity if the magnum produced a significant increase in velocity. Anyone see a problem with this approach? Hopefully accuracy will not be affected.