06-08-2015, 12:56 AM
Elaborate on that rating, please. A 5.56 of what weight with what load. I suspect that the g forces from a lightweight 10" 5.56 with a MK 262 load is not going to be much different from an 18" - 20" Grendel shooting Hornady Factory Loads.
"Those who sacrifice liberty for security, deserve neither." Benjamin Franklin

