Best barrel in the $300 range

[Jimla]

In about the $200-$330 price range
Faxon Match Series (No 16" Fluted, but very light 18" and 20" Fluted options.)

I'm been happy with my 1/3 MOA Faxon Match Series- 20" Heavy Fluted, 6.5 Grendel, 5R, 416R, Nitride, Nickel Teflon Extension Only 1.98 lbs

They have other Match Series
Match Series- 18" Heavy Fluted, 6.5 Grendel , 416-R, 5R, Nitride, Nickel Teflon Extension Only 1.81 lbs
Match Series- 18" Gunner, 6.5 Grendel, 416-R, 5R, Nitride, Nickel Teflon Extension Only 1.68 lbs
Match Series- 16" Gunner, 6.5 Grendel, 416R, 5R, Nitride, Nickel Teflon Extension Only 1.53 lbs