I have an ER Shaw barrel on my 416 Taylor. It is an accurate barrel, the rifle is capabale of 1 1/2 inch groups at 100 yards. Remember this is a big girl, so I can't shoot her off the bench. This is off sticks, standing up. I am very happy with mine.
Shaw barrels compare to factory barrels. They use to make some factory barrel for some manufacturer, I suspect they still do. Not target competition, but OK for a hunting gun.
If you have a shot out barrel or want a different cartridge for hunting then it is a good deal. But I'd not take off a factory barrel to put a Shaw barrel on if I wanted improved accuracy. There are better barrels made but they cost a little more $.
I've read mixed reviews them. I've never handled one, but for the price I wouldn't mind having one. It appears you can choose from a bunch of different options like odd barrel lengths and a whole slew of different calibers. I'd like one with a laminated stock,21" sporter weight matte stainless barrel in .250 Savage. I believe they are made on the savage 110 action.