Ideas for straightening out 71/84 tube mag?

[browningautorifle]

raising a dent in a shotgun barrel.

Exactly, if you could find the tool for .410 it might work too...

Once you have pushed the rod behind the dent , use a small ball peen hammer (use the flat side not the ball) to raise the dent by gently tapping just outside the perimeter of the dent (around the edges). It is the similiar to auto body work when raising a dent with a dolly.

force the dent out...and tap with your machinist's hammer to eliminate the dent.

Just what I said...