Depends on the gun.
My full auto 1919 starts hiccuping when the barrel gets eroded enough to get blow by. Not enough back pressure is created to cycle the action reliably. I was a BulletFest with my 1919 fitted with a converted MG34 barrel that was so wasted I could not hit a riding lawn mower at 100 yards so if you have a worn barrel, a propane tank at 200 is pretty much not going to happen.
I don't think it is much of a safety issue as long as the barrel will still headspace.
My full auto 1919 starts hiccuping when the barrel gets eroded enough to get blow by. Not enough back pressure is created to cycle the action reliably. I was a BulletFest with my 1919 fitted with a converted MG34 barrel that was so wasted I could not hit a riding lawn mower at 100 yards so if you have a worn barrel, a propane tank at 200 is pretty much not going to happen.
I don't think it is much of a safety issue as long as the barrel will still headspace.