Picked up a gnarley looking old Webley Mk VI the other day, Little finish remaining but all screwheads are pristine and the gun is tight as the day it left the factory. Excellent bore, no visible wear to the hand or the star on the cylinder. (Or whatever you call that thing.) The gun had been converted to 45 ACP. The thing shoots EXACTLY to point of aim at fifteen yards!! and puts them into a couple of inches!!! Fantastic.. And then I read something that was disturbing. Apparently the 45 ACP round, low pressure that it is, is STILL an overload for the old Webleys. The barrel is marked 6 TONS by the proof markings. I assume they mean metric tons, so the gun was proofed at 13500 PSI???? If so, that I guess the 45ACP is a serious overload. Is the gun safe to shoot? So input from those wiser that myself would be appreciated. Until then it is light handloads for the old girl.