Miller, as I see it, the Jone's system literally bolts the barrels down to the action bar and no movement is possible. And if it's properly built it also retards most of the rearward movement. I've heard more than one old gunsmith claim they've never seen a gun with the Jone's underlever off face. I can't speak to this though I have two with the Jone's system I'll never shoot them enough to know.

John McCain is my war hero.