Re: 308 or 260 Rem
Using iSnipe:
600 yards
308 with 175 smk @ 2790 @ 4400 asl = 1,416 ft/lbs
260 with 142 smk @ 2860 @ 4400 asl = 1,432 ft/lbs
That is about when the 260 overtakes the 308
500 yards
308 same as above = 1,623 ft/lbs
260 same as above = 1,589 ft/lbs