I've used mine on several of my rifles, from 30-06 to 458 Lott. All of these are bolt action, so the issues with doubles wouldn't apply.

It was reccomended to me by D'Arcy Echols.

I don't load it down so far as to mimic a cement wall. I put enough that I don't get the crap beat out of me when working up several Lott loads, though. So far no problems with scopes or stocks. No real effect of POI that I've noticed as well.

-Steve