So I'm new to long range hunting forum. I am shooting a Savage 110 HS in 338 Lapua. My go too load has been 88.5 grains H1000 with lapua brass and a 300 grain berger hybrid and a fed 215m primer. Velocity is a consistent 2760 with that load. Using the same bullet and primer and set .015 off the lands as I always load I changed it up to reloader 26 to try at 90.6 grains charge weight. The rifle shot a 5/8 inch group at 100 yard zero at 3130fps primers looked good no heavy bolt lift. So far reloader 26 seems to be a winner in my book. I have more load work to do to fact find but no complaints from me.
What chronograph are you using and did you shoot both loads over it at the same time? I can pretty much guarantee that 3130 FPS is virtually impossible out of a standard lapua and a 26" barrel, or any length barrel for that matter. At even remotely safe pressures anyways.