I run a very similar cartridge in that its a 6.5mm and holds around the same powder charges.
Mine has 24 inch barrel. I get slightly more velocity (150fps) than you with 27.5gns 8208, its my most used rifle by a long long way. Had a Factory Grendel bolt action been available at the time I would have gone that way.
FWIW 123gn Eld-M's loose their accuracy past 700m but pretty good till then, Laupua 123's are good to 900-1000m (shooting steel) and my self imposed limit on game is 300 or less (this seems to be about normal for 6.5 shooting 120-123gns projectiles around these velocities as my good mates Grendel is very similar / same
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