Ratchet Rifling

[tightloop]

I was discussing a new rifle with my buddy last night and he told me of a new barrel Shilen was putting out with ratchet rifling.  It is supposedly brand new and Shilen is the only one doing it.  All I know about it is that the left most land infront of the chamber neck is not square in profile , but the right hand land is square.  I learned that the first 3 places at the Bench Rest Super Shoot used these barrels.  

Any one know anything about these new barrels?

[ArturoJ]

Interesting, sounds kind of like Henry rifling, if I remember right. What was old is now new again.

[Carlos]

Or the 5R riflinf currently used in Mike Rock and Obermeyer barrels - there ia a bit in Glen Zediker's AR book on this form of rifleing. It is superior to regular cut rifleing - not sure what added expense it would take a company to produce it though.