realmfg,

Go to the technical forum and read my post about "Explain this (broadhead experiments)". I shoot Easton XX75's in a 2315 and 125gr field tips. This is a classic setup and the field tipped arrows are wickedly accurate - I mean, I have almost Robin Hooded an arrow at 20 yards. I've torn fletchings and busted nocks many times at that range. A 100gr field tip will fly good too, but will fly a just a hair higher than the 125gr field tip. Broadheads will be a completely different story (as you will see in the post in the technical forum). Some 125gr broadheads will fly low. Some will fly great. There's too many variables involved.... I don't have a degree in physics! [:-] After a process of elimination, I have found that out of my old bow, I can shoot 125gr field tips dead on accurate, right in the bullseye at both 20 yards and 30 yards. The 100gr Magnus Stingers (even though they are 100 grain) fly amazingly accurate and also hit the same exact point as my 125gr field tips! My 125gr Thunderheads still fly just a hair low (no big deal - I mean we're now talking less than 1/2" if that...)

Basically you have to consult arrow charts, KE tables, etc... and find the right combo for your setup, I would guess. Good luck!

Butch A.