Drew;
I have scrolled down to the page in your link which compares pressures for 32 grs ballistite vs 42 grs Schutz, both with 1 1/8 oz shot. The Ballistite load gives 1232 fps @ 2.9 tons (8624PSI) while the Schultz gives 1220fps @ 1.69 tons (4558PSI). However at the 18" & 24" points the ballistite load has .33 tons & .21 tons while the Schultz load has .55 tons & .32 tons.
Now lets assume I have a sound gun in good condition with adequate wall thickness in that important area at the chamber & first 2/3 of the barrel but am concerned because it is thin from 20" on to the muzzle. Is there really any valid reason I should chose the Schultz with its considerably lower breech pressure over the Ballistite load with its noticeably lower Muzzle pressure. With the nearness of the ballistics of the loads both are going to be very close to each other in overall pressure, it's just distributed differently.
Again I feel the entire picture needs to be looked at, not "JUST" the maximum breech pressure.
