28 Nosler, throated .300 for 195g Berger(.755 G1, .387 G7), 26" X Caliber #6 taper, Gentry "quiet" muzzle break, Rem 700 BDL SS action, Boyds forest green laminate stock or Rem LSS laminate factory stock, 22 lines per inch checkering, stress free pillar bedding, re sprung Walker trigger to 1 1/2 lbs. Will shoot the 195's into tiny groups at 3050, and max vel of 3200 but primer pockets will not last but a couple of firings.
This "custom" rifle will NOT break the bank.
The 28 Nosler is the 6BR of the large calibers loaded with R#33.
My second long range rifle would be for shooting the 168g Berger VLD hunting at or near 3150 without blowing primer pockets, 7/300 Practical(300 Win mag necked down) and the 7mm Mashburn Super(300 Win mag mag necked down, shoulder pushed back with long neck) will do this in spades. 180's in both cases are in the 3000 fps area.
The above are hunting rifles, not target rifles or tactical rifles.
I and family have shot 7 STW's customs with zero freebore for many years, 120g Nosler at 3850, 140g C/T at 3650 and deer flop to 550 without exception. Just need more bullet weight to get out further, time for a new case that is available(300 Win Mag).