Just for fun I calculated the maximum possible speed for 70# peak, 30" draw, 8" brace. If the bow is 100% efficient, which of course is not achievable,it would propela 350arrow at 390.3 ft/sec and a 600 grain arrow at 298.1 ft/sec. Wow, given how far the technology has come in the last 20 years, I wonder how close we'll come to these numbers in the next 20 years.

Now if someone could come up with a 250 grainarrow that didn't loose it's initial velocity and the bow could handle itand I use the same conditions above I get 461.8 ft/sec. Now you're talkin!