How hot do you guys run your guns. I was watching shooting USA and those guys go through a lot of amo. I shoot my new AR about five to ten rounds and let the gun cool right off. I will go shoot my 22 or handgun and then come back to the riffel. I would gess that these guys go through barrels preaty fast. What would be the life of a barrel when you are rapid shooting like that 30- 60 rounds rapid fire ? What would be the life of a barrel when letting it cool off after every five rounds? Just curious. F.K.