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Thanks for the link to the heat data. This will help me justify using grease on the bolt and carrier.
For what it is worth I have a Bushmaster that is about 12 years old and has about 10,000 rounds blasted with much hard use and rapid fire, I still shoots about 2-3" at 100m.
Here is two videos of Colt Defense Testing m4 and socom barrel in this article. I love the F-bomb in the video that NY times left in:laugh:.
Barrels are like tires- how long they last depends on how you treat them.
One trick to help rifle barrels cool quicker is to open the bolt and tilt the weapon or put it vertical to let air flow through easier and carry away the heat between strings
I find it funny that ALL these torture tests are done with a DI system! Why no piston systems if they are soooo much better?:rolleyes: Just asking!:sarcastic: Come on you piston guys let see you melt one down!! let see you do a 1000 rounds!
I have a noveske mid length with abt 16,000 on it. It is still more capable than I am.
I have seen a barrel get shot out, Littlelebowskis 5.45 upper (unless he has shown the barrel hasnt been shot out). The rds went from being accurate to tumbling and keyholing instantly.
PJ