The 3" Magnum action spring is exactly the same as the standard spring. The only difference is the barrel - one gas port - and the heavier action sleeve.
Wrapping steel wool on a bronze brush will burnish the chamber, and in many cases that's enough, but I have yet to have the hone fail.
What could have happened... did.
Last edited by Virginian; 09-25-2013 at 11:33 PM.