Can somebody please convert 108 FPE to FPS?

I read on an Altaros post that 1 mile was achieved with their M24 PCP with a 67 grain slug.
"144J - 108FPE was muzzle velocity ( at the end of the barrel ) and 33J- 25FPE on the target."


I normally read FPS when using Strelock Pro and with my MagentoSpeed. So I wanted to know what it equivalents.
You need to watch the video, it took a bit to get the balloon.
 
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Teach a man to fish.

FPE = (MVfps*MVfps*WTgr)/450240
(FPE*450240)/WTgr=(MVfps*MVfps)
therefor: sqrt(FPE*450240/WTgr)=MVfps
Oldspook
Thanks for chiming in.
I'm a simple man with only 1 year community college 50 years ago.

Perhaps after i wake up tomorrow, it will all come back to me.

Rod in San Francisco
 
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