Originally Posted by
Ridge Runner
grasping straws mostly here, if this is the first full power load on them its probably just overpressure, but you could probably use the same load and just seat them deeper, velocity would probably go up a tad and pressure go down by just giving them a lil jump.
RR
Old ones were 2.737 OAL, just loaded 9 at 2.730 and 47.0, 47.5, 48.0 grains instead of 48.5. Will test them out in a couple hours and see what happens. I have shot this load many times in another batch of Lapua brass and never had the primer thing happen...