Before I learned about action wrenches I only had a nut wrench and barrel vice. Never could get the vice to work on the two staggerfeed actions I had. So, I took a pc. of 2x4 lumber and made it fit into the action through the magazine cutout first removing the magazine. I clamped that in a vise and beat the snot out of the wrench with the biggest hammer I could find. Didnt loosen the nut. I then got long pc. of pipe, flatted one end to fit over the wrench. It gave me a lot of torque. Still didnt move the nut. I ended cutting the nut off with an abrasive disc on a dremel tool. It did work on the next one which was still pretty tight. The initial pounding on the wrench was so violent it almost destroyed the cogs that fit into the nut grooves. In the army we called a procedure like this a "field expediant". PS: both rifles are MOA shooters. 7x57 and .35 Whelen.

El Lobo the hacker