|
fhwiggins: It's pretty simple: the groups started getting bigger. I don't have a 'before' picture, but copper streaks were visible both in the grooves and on the lands when looking at the rifling at the muzzle.
HiBC: Before I did this, I polished a drill bit shank I had (high-carbon steel, similar to the barrel) and I put it in a cup full of ammonia, put the cup in a plastic bag and left it overnight. There was no evidence of etching or any effect on the steel whatsoever. It might be the other chemicals in those solutions that cause problems.
|