He knows something is wrong but the guy who built his rifle is not around to fix it. I think he is comfortable with the accuracy he is getting with the donut.
I am in the same boat. I had a rifle blue printed and rebarreled by one of the very well known accuracy gunsmiths. It shoots barely better than it did with the factory tube. I already had him put a second barrel on it and although it shoots more consistently, it is not what I expected for $900. I am not going to waste my time with the guy anymore and will just leave the donut on.
IF you have a stiff enough stock, you can full-length bed the barrel (a la Melvin Forbes) but otherwise, you are trying to find a way to dampen that little barrel. Casey's barrel is not a thin barrel, he doesn't get a mulligan on this score but found the donut worked for him anyway!
