Factory loaded shells run high pressures to work automatics reliable in cold weather. Face facts we are 1% of the market for ammo makers so it does make sense for them to tailor loads to work the vast majority of guns in use. That is semi automatic guns like Remington, Beretta and Benelli not Fox, Lefever and Pakers.
Actual speed & pressure testing by Tom Armbrust some time ago.
3 Dr. Eq. 1 1/8 oz. Winchester Trap Load
1,202 fps 9,600 psi
AA Xtra-Lite 1 oz WAAL12
1189 fps 8000 psi
AA 'Low noise Low recoil' 15/16 oz
980 fps 6,200 psi
So can your gun handle regular 1 1/8 ounce 3 dram equiv. loads? If so that is a 9600 psi load so I would feel OK shooting 9800-10,000 loads in limited numbers. Heck what would a 1 3/8 ounce Winchester load in the day run more or less than that? More I suspect or is not more still in the same range.
