Pongo defined prolonged firing?
heat transfer from the gun barrel to atmosphere on plane traveling at 300mph and at altitudes above sea level is great.
You wont melt a barrel or warp it with less then 15 sec continous fire.
JB mg 42 fired on the ground can sustain more the 15 sec fire.
Gun jams are different in that theres a variety of factors that contribute. Studies that predict gun reliability are based averages and are not exact. If you hard code it that xx gun should jam 1 every 5 missions its bs.
If its random and considers real life data and incoporates that into "random" thats fine.
But having 1 out of every 7 spits in mission end up with a jammed hizooka would be bs.
How the gun was cleaned, loaded etc all effect the probrability that a gun will jam.
Guns didnt auto jam at 3 gs either.
The only way to do it would for it to be random as Dowding says:
'Random' gun jams based on a statistical study are fine. But I doubt you'll find such a study for every weapon in AH
Now find that data so ht can do it.