I have thought a lot about this lately and here is what I am doing. I have 3 primary weapons: AR-15(.223)-5000 loaded rounds FAL(.308)-5000 loaded rounds XDM(9mm)-5000 loaded rounds Also have sufficient components to reload all 5000 rounds for all 3 calibers. This should be good for any situation I would think. I dont have all this put together yet but am half way there. I collect brass from the range and load what I can and trade what I cant. Its working well so far.