Good Grief! Savage must use 6 foot breaker bars

[wbm]

Five decades of working and building on Savage rifles and I have never had that problem with a bolt retaining screw....like ever!

 

[Dgd6mm]

For the stubborn nuts....I've gotten everyone off by doing this. Wheeler action wrench, take and put action and wrench in my 6" Wilton vise.Doubled up nut wrenches taped together , 4 pound dead blow hammer. Works everytime. Matte and blued finish barrels and actions new. One more thing I let a good penatrating oil soak in for a couple of days from the flange end of the nut. The more bluing salts in there the tougher they are to get off.

 

[hoosiermike]

For the stubborn nuts....I've gotten everyone off by doing this. Wheeler action wrench, take and put action and wrench in my 6" Wilton vise.Doubled up nut wrenches taped together , 4 pound dead blow hammer. Works everytime. Matte and blued finish barrels and actions new. One more thing I let a good penatrating oil soak in for a couple of days from the flange end of the nut. The more bluing salts in there the tougher they are to get off.

I tried every trick you listed and then some but it would not break loose. Been doing this for over 40 years and never saw one like this one.