Breaking this down into a unting scenario (for you, Bruce).....I'll be shooting 60#'s and using a/c/c 3-49's, this fall. RIGHT NOW.....my plan is to utilize a 100gr BH (mechanical). I think I'll be getting +/- 290fps out of this setup.....and my total arrow weight will be in the 375gr. range (+/- 5 gr).

That's +/- 70FPKE.

"IF" I thought I could go with a 125gr head and not require an arrow change (due to spine).....I'd consider it. It would help my FOC.....AND (I assume) my "momentum".

But it would slow my arrow down, I would think, considerably. So how does that compute as far as "diminshing returns"?

Thanks for all your help.