With something like the Bushmaster ACR or Robinson XCR, you can have two barrels, and when you run out of your 6.5 ammo then you switch barrels pretty quickly and start using enemy .223 ammo ON THE FIELD!
6.5 MPC allows for a very versatile shooting platform, since it uses the same case as a standard .223 round and therefore can operate in the same gun with only a barrel change. People who handload ammo can have a cost effective transition to a more potent caliber and may still have the other caliber available to use with virtually no hassle, should the need to go back to the smaller round be necessary.
Adaptability is an asset for a SHTF scenario.
6.5 MPC is at the top of my "bigger bullet for an AR" list.
The 6.5 Gren and the 6.8 are impressive on paper and perhaps in the real world as well when we look at bullet weight vs velocity alone, but I think the MPC round has more to offer for my money and is more "PRACTICALLY established" from my point of view.
Time will tell how my current choice stands against the "others" in the long run.
Free men are citizens of THE EARTH, not countries, governments, or other nonsense.
3 laws for prosperous freedom:
1. Respect the life and property of yourself and other individuals.
2. Always maintain your ability to defend yourself.
3. Let no one have power over YOU.
Last edited by LethalJustice; 07-23-2010 at 12:38 AM.