RE: MO deer hunting
Allan
You've got the poundage covered and I'd suggest a 100 grain broadhead. I'd also suggest looking at the expandable type mechanical broadheads as well. They fly just like your feild tips. You could drop as low as 85 grain on the broadhead, but your kenetic energy will drop off as the weight of the arrow decreases. A 100-125 grain head supplies plenty of KE and should work well on whitetails.
Good luck!
GH