You'll get no arguement here on the ability of the 257 Roberts. I've taken blacktail and antelope with mine. I thought this subject was about bullets at 30-06 velocities.
In case I've stepped on any other toes I've also taken blacktails with: 6.5x55, 7x57, 25-06, 264 magnum.
I've seen blacktails that were taken with: 243, 6mm, 220 Swift, 257 Weatherby, 7mm-08, 8 mag, 270, etal.
They were all dead!! :roll: