MountainDevil54

Here i go again out in left field.... but all metal has pores and all metals can be treated to help resist rust and fouling. You do that everytime you oil your bore.

It is a matter of using the correct product and using it correctly. Montana X-treme Bore conditioner is a good example.

BB worked for a long time for me - if it were applied correctly...

So once again I do not follow the norm...

I also should add that i did ask a metallurgist at the University about this same question - Iron - steel - and even stainless have the ability to retain residue/compounds in the pores. Heating the metal will open the pores of the metal to some extent. Overheating will have the opposite results. Iron will certainly retain more substance in it larger pores than does the different varieties of steel.