My take on the "circuit judge" is it can probably handle the stiffer loads. Like those called for when used in lever action rifles.
Consider this; Cor-bon loads are available for 45 colt that are really only made for really strong revolvers in 45 colt. There's always the possibility for someone buying the high pressure, +P cor-bon ammo, then firing it in a rossi judge or C-judge. Rossi could NOT sell something that would NOT stand up to the hottest ammo made for it.
http://www.shopcorbon.com/CORBON-Hunter/300/300/dept
I have a Rossi lever gun in 45 colt. According to what I have been able to find, it is rated for the Marlin and Winchester modern levergun loads.
http://www.rossiusa.com/product-deta...adcrumbseries=
I've fired it with handloaded jacketed and my own cast lead boolit loads. Most were loaded to levergun load levels, it just gobbled them up and wanted more!
It is a lot of fun to shoot, and is quite accurate.