[ApplegateRanch]

Or just shoot em twice...

Which weighs more? 1 .30 round or 2 .223 rounds? (Screw the damned Froggy metric system.)

If part of the point of the smaller round was to allow the carrying of more rounds, then that more than defeats the purpose, no?

[NYleatherneck]

I'm saying that you make do with what you have. The M4/M16 works fine. If you hit somebody in the chest, they'll go down. If they don't go down, keep firing until they do.

Semper Fi,
NYleatherneck.

[supercat]

If part of the point of the smaller round was to allow the carrying of more rounds, then that more than defeats the purpose, no?

If the purpose of a firearm is to actually kill the enemy, heavier is better. If the purpose is to keep the enemy out of your line of fire, lighter is just as good.

Were it not for the logistical difficulties of having to deal with separate calibers, I would think it might be interesting to have a firearm with separate "suppressive fire" and "targeted fire" functions (probably two barrels, fed from separate magazines). I'm sure the weight and complexity would render the idea impractical, but there would be some appeal to the idea of having 100+ rounds of .22lr ready at hand.