I used the 100 grain model all deer season this year. I killed two deer. The first was 21 yards, double lung, she died in sight 59 yards from my tree stand. The second was a BB at 16 yards--double lung and he died in sight 52 yards from my stand. Blood trails weren't necessary but were immediate and profuse.
My set-up:
LH Recurve (The Stick)46#@26". The arrow was a Beman MFX Classic size 600 with 3, 4" feathers and a 75 grain brass HIT. Total arrow weight was 415 grains.
Just for fun I'm going to go to the MFX 500 size with a 150 grain Helix next season.