Re: Cleaning pistol brass
I use to hear that all the time as well. Several individual I know who've been shooting well over 40+ years each, use it faithfully, without issue. If you look at the contents, it's pretty much the same as the others sold at a much higher cost. Most do not show what's in them. Ammonia is bad for brass but, it's only a 5-10% concentration. In a container that holds many quarts, it very minimal and evaporates quickly.
I use a capful each time I load with my large Dillon vibrating tumbler. My old stand-bye was the Dillon polish. Since switching a few years ago, I haven't seen any issues.