Re: Where is my pressure coming from?
My load manual says that 95 grains of 4350 is at the max chamber pressure of 62600 psi with a 270 grain bullet , 2930 fps , 24 inch barrel ? So you are still too hot for your gun.
Slight tollerance differences can make one gun able to use more powder than another. You could have a slighly tight chamber , a slightly tight bore and case capacity slighly small , powder batch slighly faster , bullet slighly bigger or harder than some others . Poor extraction cam design can upsett bolt timing making one gun not as good as another at extracting tight cases.
Back off to 94 grains and see if it works better . At max pressures you may have to FL or body size after every firing.