Just depends on how much ammo you have...............
It only takes one round....and your large stockpile of ammo becomes worthless.
Strength in numbers is a valid concept and is not negated by 'a bunch of ammo'. That being said, I'm anti-social and cringe at the thought of having to deal with forming a 'group'.
At this point in my life I'd rather punch myself in the face repeatedly than deal with the interpersonal B.S. that comes with group dynamics. The whole forming, norming, storming and performing crap is tiresome.