Here's my 338-408 Chey-Tac.
Lawton 8500 Action
Brux Barrel / 1-10 twist / 1.350" breech straight for 6" then straight tapered down to 1" at 34"
CSR Muzzle Brake
McMillan A5 Super Mag / I re-built the butt section to have taper
Custom Rings and Bases / My own
Runs a 300g SMK at 3203 fps. I've ran this out over 2000 yards with sub moa performance
If I had to do it over I'd use a Stiller TAC 408 and the 4 Port Muscle Brake, everything else I'd keep the same.
Weighs in at 19 1/2 lbs.