hello guys i have a 270 caliber rifle that i put a 26" sheilan barrel on by a very good gun smith.1-10 twist rate. I just hand loaded some test rounds 140 gr ballistic tips with 56gr of H4831. shot 4 shots from 100 yards that measure .375 group. the speed was around 3050 fps. my question is what should be my maxium range for killing mule deer. as far as energy goes? i don't know how to calculate that. i have killed them at 450 yrds with 130 gr bullets. I am so glad i found this long range hunting forum. you guys are truely the best.