I'm using 10 SSK barrels. With JDJ calibers, I use the .257, 6.5, .309, .338 and a pair of .375's, and all have been very satisfactory, from the standpoint of case forming, accuracy, killing power on the game each is intended for and durability. I'm also considering a 9.3 at the moment.

Given my complete satisfaction, I haven't been inclined to try the GNR's. Some owners love 'em, apparently some haven't been completely satisfied...but I emphasize that I have no direct experience with them.

When I'm happy, I'm happy. No need felt to shop around.