260 -
I got that load from Denton. It's in the Reloading Forum under Big Game Rifles, P 3 Campfire Pet loads, ScottfromDallas - Good 6.5X55 loads. THEN it's on P 1 by Denton. Pressure Tested
49.5 gr H 4350, 120 gr NBT - 3075 fps 24" bll.
I'm at 3000+ with 49.5 IMR 4350---22" bll. NO PROBLEM
I worked up to that load in MY rifle, Win 70.
Jerry