It seems 7mm Rem Mag has velocity and ballistic coefficient to be the best of common factory loads. The 338 Lapua and 50 BMG are probably better. Possibly 375 H&H Mag with spire point bullets.
I shoot my 22 long rifle ammo 1 1/2 miles. I know it’s that far cause on the box it says, “Caution, range: 1 1/2 miles.”
Love the 7mm Mag, but my favorite is the 30-06.