I have a chance to pick up ac omplete upper to finish my AR build. My question is "are shaw barrel of sufficent quality for a varmit rifle?".

so search in gunsmith forum - there has been quite a bit of discussion of them

I have an AR15 built with a Shaw barrel. Mine shoots just fine for groundhogs out to 300 yards all day long. Never shot past that with it.

A number that I have range from .7 moa to 1.375 moa (best loads). On most no attention has been given to bedding.
The latest which I have not fired yet was said to produce a 5 shot group that could be covered by a quarter at 100 yds. by the guy who put it together. It was a bedded 98 Mauser. roger

I might mention my .257AI also has a Shaw barrel and shoots 5 shots well under an inch at 100 yards.

Thanks guys. I appericate all your comments. I'mon a very tight budget for this build but still want it to minute of ground hog.

Mine is a varmint weight" drop in "Savage in 220 Swift. It shoots sub-moa out to 300yds. I have not shot beyond that except for a few prairie dogs. I have gotten kills at just under 400yds. I would certainly use another when the need arises.
GOOD LUCK and GOOD SHOOTING!!!