I went down a similar route a bit before Christmas and got keen on a 6.5 Grendel as well but ended up with a 2nd hand Rem 700 adl in 7.08 mm and like yours it shoots really well.
The Grendel is a cool little cartridge and I think would make a good 300 mtr rifle but it really starts to lose it's energy out further hence my choice on the 7.08 mm
I think you just need to get out with the 7 mil, you know it likes the white tail ammo and do some distance shooting and get a drop sheet worked out or run a ballistic app and dial up.
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