I have been using the 140g T-Rex for 3 years now in my 22in 280ai, at 3150fps. This bullet has been proven on bull elk, mature mule deer bucks, Whitetail bucks and antelope.
Shots from 60yds, out to 450yds, this bullet has performed perfect
ever time. Have only caught one bullet on a 60yd antelope frontal, located in rear ham. All others have been pass throughs, even bull elk at 325yds. Perfect performance every time and easy to work up a load. Have even shot varmit at close range and damage was minimal.