Thanks Daryl.

Roundball is so damn cool.

Daryl notes some FPE numbers on that .54RB Moose kill at 170 yards, including autopsy details.
The terminal performance of that mid-size ball rifle at 170 yards was pretty damn good.
Curious about impact velocity?

I'm guilty of quick and dirty, and as I have the Lyman BP manual at my side here which includes some load comparison charts for the .535 roundball, they include MV/FPE and Vel/FPE at 100 yards.
Leg's up in a splint right now, so I'll take from this instead of firing up a calculator or getting up to grab another chart.

At MV1800fps, the ball is doing about 1090fps at 100yd shedding 710fps
At MV1090fps, the ball is doing about 850fps at 100yd shedding 240fps

That's based on 230 grains weight, it hit the moose at just over 900fps!!

Not bad.
Slow little lightweight ball.
Not bat at all!

--Tinker