danny
Silver $$ Contributor
I use the O rings in every die set I own. As it has been stated, different dies respond differently, but the O rings make small adjustments easier to make. I like 'em!!
I guess that o-rings in dies are sort of like the saying about tracers, in that they work in both directions. They make the adjustments easier to make; and easier to lose. When I buy Lee Rifle dies, the first thing I do is toss the rings, put good ones on, set them, lock them and move on. When loading for handguns with Lee dies, well, I use them. There's not much to "refilling" some handgun brass.
Danny