I have never used them in the field but the closest experiences I can relate are those of two acquaintances who live in Wyoming in Riverton. They use the 140 grain in a 270 win and hunt Elk and Deer with that combo and regularly get complete pass throughs on Elk not to mention deer. That is wide open country so there is a lot of opportunity for a long shot and none feel undergunned with their outfits as a matter of fact they sneer at the non residents(me) packing big magnums. One has given up handloading because the winchester load shot so well thru his gun.