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Nosler load data base has some info on 160-168 gn pills with N560 or N165.
Agree somewhere around 52-53 gn would be a conservative start point, work up carefully & expect pressure signs around...

I run 162 AMAX in my 280ai using N560, getting 2980 fps and 0.5moa or better. Should work ok with 168 VLDs or 162 ELDMs, but bare in mind you won’t get the same velocities out of a standard 280...