I decided to crunch some numbers in order to obtain a rough velocity estimate for a couple of different Bowtech bows at my draw length, and I'd definitely appreciate it if you guys would check my math and/or offer suggestions for a more accurate comparison. I am not trying to get the exact real world velocity so much as compare these bows side by side. I've also decided to be an extreme optimist and use only the highest possible velocity for each bow.

My draw length is 27.5" and all arrows would weigh the same at 386 grains. The assumptions are that 1" draw length loss results in 10fps loss, and 3 grain arrow increase results in 1fps loss.

1) 70lbs Bowtech General, IBO Speed Mod 315fps max. Velocity = 315fps - 25fps [D/L loss] - (386grs - 350grs)/3 [arrow weight loss] = 278fps

2) 60lbs 2008 Bowtech Equalizer, IBO 308fps max. Velocity = 308 - 0 [no D/L loss] - (386grs - 300grs)/3 [arrow weight loss] = 279fps

3) 60lbs Bowtech 82nd Airborne, IBO Speed Mod 350fps max. Velocity = 350fps - 25 [D/L loss] - (386grs - 300grs)/3 [arrow weight loss] = 296fps

Any additional input is greatly appreciated.