Below is a pic of my two 260 rem,the top is on a savage action with a shelin 1:8 twist.Working on this one for my 600 yd rifle so far it is shooting great at 300 yds,(thats as far as the range I use goes.)
The bottom is a rem BDL in 260.
The fartherest I have shot a deer with the BDL is 447 yds.I tried a 100 gr BT this year and dropped a 100 lb doe at 140 yds.
Have a tikka in 25/06 and it shoots great dropped a buck at 250 yds,both bang flops.Have a rem classic in 243 have taken more than a few deer with it 300+ yds.
For me the 260 is the best of the 3.The bdl you can shoot 85 to 142 gr bullets.
I tried 3 160 gr bullets in the savage with the 8 twist at 100 yd and all three went in one small hole.