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"?
Jeff, if you get a chance, chronograph your arrow that you are shooting both with a 100 grain and with a 125 grain and see what the change in KE is.
I ask this out of curiosity because with my set up, I get basically the same KE either way ( I think it was within 1#), based on the formula used for KE.
I can't remember the specifics because it was last year that I did it. But I know I was surprised that the 125 slowed down the arrow enough to keep the KE the same. However, I am assuming the 125gr has more MOMENTUM even though KE is the same. Is this correct?