What exact bullet weight for each load you tested, and what is your barrel's twist rate ??
I'll check the bullet lengths when I know what bullet you are shooting. A few have mentioned
that the 7 PRC has too long of a throat, thus too much jump when fed from the magazine.
A VLD style bullet will favor a longer jump.....Did the Hornady shoot better then the Federal
at all ?? Group size at 100 ??