Either reload low pressure (7500 psi or less) and light shot charge (1 oz or less) or buy "vintage" type loads. DO NOT run out and buy SAAMI standard (typical USA) loads. They may have too high pressure. Your guns are most likely 2 1/2" chambers. That for sure requires known low pressure if you are going to use 2 3/4" hulls. DO NOT shoot any shells you do not know the pressure of. Most CIP (typical European) 2 1/2" loads will be fine. Your guns are most likely game weight and will recoil sharply if you use either heavy shot charges or high velocity. 7/8 oz shot at 1100 fps will "gitter done" for most shotgun needs.
