MY Win 70 264 mag EW 26" Bbl will easily drive the Nosler 140 AB to 3222 fps using VV24N41 powder. With a 156 gr bullet a yet slower burning powder like US 869 should do the 3100 fps with ease. These powders ( VV24N41 & US 869 ) are far slower than Rel 26 yet seem to be over looked.
Isn't US869 extremely temperature UNstable?