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**Bud Helms** · July 22, 2006, 08:35 PM

Nope. No simple formula. It's much more complicated than that. Best way is to find a copy of each and fire a group of the same loading from each and measure velocity. Get an average difference.

July 22, 2006, 08:35 PM	#2
Bud Helms Senior Member Join Date: December 31, 1999 Location: Middle Georgia, USA Posts: 13,198	Nope. No simple formula. It's much more complicated than that. Best way is to find a copy of each and fire a group of the same loading from each and measure velocity. Get an average difference.