I have Larry's articles. Mr. Bell's article compares the presure of various black powder loads with low presure smokeless loads @ 5 points along a 12 ga barrel. none of these loads were above 6000psi so we can't say for sure what would with the 7k load vs. the 48oo psi load. But it was very clear that his 7/8 oz 4800psi load was 100psi higher at the chamber gauge and lower thruogh the rest of the barrel than BLACK powder. Without srtain gauge measurement @ varius places along the length of the barrel. If someone has the results of such an experiment please sare. Mark
