I shot that BB load out of my 6" gun and got 1157fps 469ft/lbs.
That matches the energy levels of Winchester's 145gr Silvertip - in 357Magnum.
It also blows the doors off most 9mm+P loads, and approaches the raw power of some of the lower-end 40S&W rounds.
Tim Sundles is a wildman but his loads are NOT reported as blowing up guns. Dude knows what he's doing. Reminds me, I have to get some of his stuff in 9mm+P or +P+ soon.