With the 129 running at 3,350 or so with the best accuracy loads, 3,400 max, I don't see how one could get 3,250 or even close with a 160.
Check on line for Nosler's load data for the 26. Ramshot Magnum was the most accurate powder and 80 gr. the most accurate 129 load.
DF
Not sure what gun you shot, but my 26 nosler shoots factory load 129 gr long range accubonds at 3540 fps.
