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Prefferred starting load for W748 behind Nosler 120 BT?
Starting around 27.5 and stopping around 30.0 should do it.
I use a max of 31.7 grains of W748 with the 120 Nosler BT in Lapua brass with a CCI 450 primer, but that load is above anything I ever saw posted, so I wouldn't necessarily recommend it. It may or may not be safe. I definitely wouldn't load quite that high in the Prvi (Wolf) brass since its large primered and a bit softer.
Good luck with your loads, the 120 Nosler usually shoots very well in the Grendel.
One caveat: After shooting the Noslers you might see your groups slip a bit if you switch to a Sierra or other make bullet without cleaning. They'll settle down after a while, but it's easier to just shoot the Noslers last if you are using different makes that day. Bill A. Posted on this previously, and I've had the same thing happen. It seems to be something about the different alloys in the jackets. It'd bother me, but the Noslers shoot SO darn good and work really well on critters at Grendel velocities so I don't mind.
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