BOBNH: 10/4 on the 7 Rem Mag. I can't remember when I got my first 7 mag and now have had several. ALL OF THEM would give 3300 fps w/139-140 gr. bullets with IMR 4350 & slower powders like IMR 4831 & IMR 7828.
3100 fps is CERTAINLY achievable w/ 160 gr. bullets with IMR 4831 & IMR 7828.
Having reached the velocities I wanted with those powders I have not tried some of the NEWER powders that I hear will do it also.
A quality CHRONOGRAPH is an indispensable tool to verify your own gun/s velocity and the VERITY of some handloading manuals.
I have a manual which shows loads WAY TOO HOT and more than one which shows load WAY UNDER potiential. We must compare more than one manual AND chrono to see what reality is.
