Talk:Rock salt

I keep hearing "rock salt" come up in movies as either a slang term for the innards of shot gun shells or perhaps a literal reference to what is inside of particular shotgun shells. I came to Wikipedia to look up that term and was shunted to Halite, but I'm thinking that perhaps there should be a disambiguation page. I can't say for sure, because I don't know exactly what rock salt is meant to allude to. I will keep searching for a source, but I wanted to get a conversation rolling about it. Spawn777 (talk) 22:06, 15 April 2013 (UTC)