Back before I ever heard of an action wrench and having given up on a barrel vice I was at wits end (happens freqently). Necessity being the mother of invention I did this; I found out how to remove the magazine box from the action. I trimmed a pc of 2x4 to fit the hole in the bottom of the action and put that in a vice. I then repetedly pounded on the nut wrench with a 500 lb hammer (just kidding). It finaly came loose. The wood held the action nicely and I could discern no damage to the action. Used that method again on 2 more actions, all on stagger feed actions. Never had a problem with those actions.

El Lobo