Okay, I had this rifle for years, even cleaned it yearly, tried pushing lubriplate grease down the barrel..just checked it again yesterday, It is STILL CORRODING inside..it was a decent two groove barrel, inspite of being chromed..yesterday, I used Blackpowder solution to clean the barrel followed by Non-phosphate glass cleaner... washed out with fine machine oil...It really is priming my pump, as it looks to be converting into a sewer pipe... The rifle had been converted while it was nearly new, and had the firing pin welded up...So how did this crap get stared in the barrel??