With my Trykon XL set at 60# @ 29.5" with a 361.25 grain arrow it shot 262 so 250 would probably be best case scenario with the larger tip. You would have plenty of kinetic energy to kill a whitetail though. You can look up the formula for computing KE on the web and into the specs of your bow and arrow and find the exact KE of your setup.
06' Hoyt Trykon XL
Quicktune 4000, Tru Glo w/light
Easton Axis St 340