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220 Swifts I have been told start going south around 5000's rounds when running full rpm rounds.
That gentleman does know a great deal about firearms, no doubt. But, he is prone to exaggeration on certain issues, and to be flat out wrong on others, but he will die on the hill of his thinking. I've head what he has to say about mag dumps and it's a bit overblown.
As another example. Just last week, watching one of his videos regarding working on S&W revolvers, he makes statements such as "there is never any reason to polish the inside of a S&W revolver, there is nothing to be gained by it" and "never use anything other that the factory main spring or you will damage your gun".
Well, I don't know about you, but I know quiet a few folks who have seen benefit with a proper smooth and polish job in their Smiths. And while a non-factory main spring might result in light primer strikes I highly doubt any damage will occur in using one.
There were other statements that caused me to raise my eyebrows a bit ...
So, the point ... he can push ideas that are really not based in observable fact.
My first AR was a Colt H-Bar. After about 5K rounds it was no longer used for competition. I used it for
plinking and 30 round mag dumps. I fired thousands of that dirty steel case Russian ammo through it. Sometimes
dumping 500 rounds in one outing. If you chambered a steel case round on a hot barrel and leave it there a couple
minutes it would stick in the chamber. Had to use a cleaning rod to get the stuck fired case out. I abused the
hell out of that barrel. Use to poor cold water on the barrel to cool it down while loading more mags! Before I sold it
at a gun show I cleaned the barrel and test fired it with good ammo. To my surprise it would shoot about 1.5 inch
groups at 100 yards. This was not a chromed lined barrel.
For the average hobbyist and recreational shooter, it would take years, if not generations. Burnt out barrels, and other signs of heavy use come from the places one would expect, ie the Military, and Law Enforcement. There are always exceptions, like the quality of the firearm, types of barrels, and ammo. Cleaning, and maintenance of the firearm. And any number of other things.I was watching something on youtube (gunblue490?) about how mag dumps and rapid fire can burn out a barrel quickly. Has anyone actually burned out a barrel to the point they noticed an issue with accuracy?
If so what caliber, est round count?
Most these online guntubers have generous donations of ammunition from vendors to allow such tests as linked above.