I got 311 from a 370 gr arrow (292 with a 430 gr hunting arrow)out of my Ally after replacing my strings and cables with Vapor Trail and messing with the position of my STS (Birth Cert has 314 I think). Drop of the STS and I'm at 294 with the 370 gr arrow.Before string/cable swap and adjusting STS I was at 283 with the 430 gr arrow.

According to OT2 my adjusted IBO is 309 now. Before it was 304. The interesting thing I drew from this is from those numbers that my bow was not as efficient with the stock string/cables and the STS in the highest position as it is now.