Color me skeptical...
I would have to actually be there to shoot some of the loads before I am going to believe that, as those did not appear to be full power loads.
Not even close.
In fact I used to load some hot 360 grain .45 Colt loads that recoiled significantly harder than that in my Blackhawks.
They were full powered 65,000 PSI loads 300 grain if memory serves, they were definately not watered down load.
