The bearing surface of the 127 LRXBT is .634 the bearing surface on the 120TTSX is .625 that and the 3 channels of the 120 make all the difference. You should be able to check the actual Ballistic Coefficient of the 2 on Brian Litz web site. There may be more or less in the difference than listed. I have been hunting deer with the 260 rem for 19 years now I think this season will be my 20th and I believe it is ideally suited for 400 or maybe 500 at a push. For 600 plus I would be shooting 6.5x284 or 260AI. For coyote its game on I wouldn't care about the range or the bullet either.
Good luck and shoot straight y'all
