If you want to reload, let me know and I will share my data. My 20 inch 6.5 Grendel AR likes Nosler 123 Custom Competition (blems!) over 31.2 of CFE223 with whatever case and primer I have on hand.
For hunting, I used the Hornady 123 SSTs - they worked on the antelope - effectively went off inside the chest like a grenade. Lots of hunting success stories with the 123 SSTs. If I used 6.5 G for hunting again, I might try the Nosler 129 ABLRs (designed to open at lower velocity) or a Barnes/Nosler copper bullet.
I’d like to get back into handloading my long gun ammo, if I get the time. The 123grn Hornady ELD-M’s and Lapua Scenar’s have both caught my eye. If my daughter hunts with it, I’ll probably use the 123grn SST’s or 120grn Hornady GMX’s.