My current 260 Rem load has been performing well. The load below has been repetitively 1/2 MOA with less than 1" vertical out to 550 yards. I think it can do better with some fine tuning.

260 Lapua brass / full length S die with .292 bushing
Berger 130 VLD Hunting
IMR 4064 @ 39grs.
CCI-200 Primer
COL@ 2.942"

Avg speed 2853 with 19 ES /12 SD with 15 shots.