Your name is Slab HardBeef, melee master. You want to test your punchfisting skill against someone with a firearm, so you call up your pal, Aim ShootBang. He's all too willing to spar with you, gun-to-fistpunch, but wait! Guns are really quite deadly. Even if Aim doesn't intend to murder you, something could go wrong, and you could catch a bullet to the neck!
Rubber bullets! Nonlethal ammunition available for firearms that, while not totally safe, are a lot safer than real bullets. They still really, really hurt, but you're much less likely to permanently injure someone with one than with an actual shot.
Also in this vein; beanbag rounds for shotguns. There could do with more, nonlethal options for firearms. Or maybe even alternative, even-more-deadly ammunitions available! But that's a different idea entirely.
What do you guys think, nonlethal ammo; good idea or no?