It is a custom Magnum Reasearch BFR .500 S&W using .500 S&W specials. which are typically around 850FPM.I don't know what's in the suppressed handgun but it's NOT factory 500 S&W. It looks (energy wise) like light 38 Special impacts.
That would make sense (low impact energy). It sure doesn't do anything to show off the suppressor capabilities on full hose 500 S&W loads though.It is a custom Magnum Reasearch BFR .500 S&W using .500 S&W specials. which are typically around 850FPM.