There are 4 different barrel contours and it takes a different rib for each contour. Straight out of Cabela's, can't see any one messing with the rib. Nearly sounds like there is a B rib on a A weight barrel?
Last edited by El_Numero_Uno; 07/23/21.
El Numero Uno a Serious Collector of the Ruger No.1 rifle; a Modern Classic Sporting Arm