I don't know. In theory I agree with this. But I've spent the last decade assembling gaming rifles tuned to the max for the sole reason that people on the internet say they won't work.
In practice I can't prove any of the unreliability, finicky when dirty, temp sensitive etc. things that are always said about gamer guns.
I understand that the operational window of my primary match rifle with its 16" RLGS barrel, titanium carrier, low powered spring and .3oz delrin "buffer" and gas turned down to just lock back should be small. But well over 30k rounds in all temperatures, at ranges that are basically constant dust storms, with cleaning intervals well over 2k rounds shouldn't work great, but it does.
I'm sure the fact that I have two loads I shoot, a light 55gr load and a hot 69gr load (used to be a hot 77gr) the guns are tuned for that ammo and I never shoot anything else, must help.
But I've also loaned it out at matches and watched people throw all sorts of cheap ammo through it and it just keeps running.
Again, in theory I understand it is "less reliable" than anything closer to mil spec, but I can't seem to find out where that failure point exists.
I have even weirder configurations of rifles that also refuse to fail, but they don't have the round count on them for me to definitively say they are absolutely rock solid.
