I have found that I like a heavier FOC and that boradheads shoot much better this way. As such a good weight range for a 2315 would be a 125 grain head or heavier. Some really good heads to check out are the golden key deadhead, rocky mountain ironhead, muzzy 125, etc.

Out of the ACC you are jumping to a lot faster arrow. I would say you can get away real nice with a 100 grain mechanical such as the golden key demon or reaper. I use ACC's (3-60) myself & like the flight I got with the golden key dead head 125 & the ironhead 125.

Good luck