Know your arms, know your ammo, otherwise you're SOL.
On some great and glorious day the plain folks of the land will reach their heart's desire at last, and the White House will be adorned by a downright moron. ~ H. L. Mencken
Reminds of the story about the kid who was shooting a single barrel 12 gauge break action shotgun with a friend. In all the fun and excitement, he accidentally loaded a 20 gauge shell, then a 12 gauge shell on top of it. It blew part of the receiver into his shoulder, severing a major blood vessel. He almost bled to death, but in the end was OK. He won't mix yellow and red shells again.