@CP270 may want to revise your approach a bit there. There is no such thing as all Tikkas will like 66gr, Brownings 67gr, Sakos 68gr etc... It just doesn't work like that.
Do a work up from low to high ideally with a chrono so that you can stop when you reach top book velocities for your bullet/powder combo. You don't have to shoot heaps of rounds doing this as you're just establishing where a safe limit is. Back off a bit from it and see how it shoots.
Bad juju in blindly trusting someone else to tell you what will be safe in your gun. You have to be diligent and do the testing yourself. It's not onerous.
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