What Are the Different Kinds of Rifling Available?
There are three kinds of rifling offered by “boutique” barrel-makers such as Broughton, Hart, Krieger, and Lilja. First you have push-buttoning. This involves pushing a mandrel slowly through a pre-drilled bore. Hart and Shilen barrels are push-buttoned. Second you have pull-buttoning. The procedure is similar but the button is pulled through the bore. Makers like Lilja and Schneider use this method as they believe it produces better results. Both methods of button rifling can be used to produce either conventional square lands or profiled lands, such as found on Broughton’s 5C barrels and Scheider’s P5 Polygon Form Barrels. The third option is cut rifling, a completely different system. Cut rifling is done by Border Barrels, Jeff Lawrence, Krieger, Obermeyer, and Rock Creek. Among these barrel makers, Border, Obermeyer and Rock Creek offer the Obermeyer 5R land profile, which tapers the land on one side. Claimed 5R benefits are reduced fouling, better gas sealing, and higher velocitie
