Ted;
I am claiming the strain on the frame of the gun is the opposite reaction of propelling the charge down the barrel, just as is recoil. Max chamber pressure is just one small part of the entire thrust. If you push an ounce & a quarter of shot out the muzzle @ 1220 fps you have done the same work, both forward & backward, regardless of the brief Max pressure. The load is being accelerated for its entire travel down the barrel. It takes an amount of time for that frame to deflect, admittedly very small, but the higher pressure load holds that max pressure for a shorter time than does the lower pressure load.
Way too many people when they consider internal ballistics get too hung up on the max pressure & that alone.
I will turn your Question around, I ask you;
Are you telling me a 1 1/8 oz load at 1200 fps will stress the action more than will a 1Ľ oz load at 1220 fps just because it Briefly has a higher max pressure?? If so explain why the heavier load Kicks Harder with a lower Max pressure??
