Re: ER Shaw Barrels
I'll tell you my experience with E. R. Shaw barrels. Had two, both "shot out" in under 800 rounds.
My well meaning sons gave me a couple Shaw barrels. I barreled them up to a Rem. 700 and Mauser 98 action respectively. The mauser, caliber .22-250 never ever shot under an inch, and after 200 rounds would not group under 2 inches.... and yes the barrel was cleaned properly with Kroil and Butch's. The Rem. 700 was barreled in .280 Rem. and shot wonderfuly for 200 rounds. I could average 1/2 inch or better with several different loads. Gradually, it began to loose its edge and after 400 rounds I could feel tight and loose spots in the barrel as I cleaned it. I had shot some moly coated bullets through it (about 79 rounds) and thought that might be the culprit, but a close examination with a bore scope showed that the cleaning method was sound, but that the metal was not homoginous in several places along the bore. In two places the rifling had almost worn away, and another place was so rough that iit seemed tight as the patches went through it. I shot it another hundred rounds or so and rebarreled the action with another barrel from a different manufacturer. The new barrel does not shoot 1/2 inch groups, but it shoots .600" groups consistently and feels great with the cleaning rod and patches. It is just more consistent. The bore scope shows a very smooth and homoginous bore. Just to make this short, I won't use another Shaw barrel.
Oh, these barrels were manufactured after their so called re-tooling several years ago. I think their metal is just not the quality that the other barrel makers use!