Originally Posted by sabotloader

kb1

Remember back in the day... Underclocked invented the term 'crud ring' for the hard residue T7 leaves in some barrels.... then BH came out with their statement to us was it is "non-corrosive" and does not create a "crud ring". since those early days we have found out that it is midly 'corrosive' and the 'crud ring' has moved from the bore to the breech plug.

So not much of anything is a 100%