admittedly the .38spl/.357 was a bad example, since it is "almost" moron proof. I have seen some pretty ingenius morons. Including myself on occasion
Yes some ammo has warnings, but not all of them do, most don't need it.
Firing a .308win out of a 7.62nato isnt going to blow it up (well as long as it's in good working order), but you will be pushing the high side of the pressure spec. If you happen to have a firearm that has "quirks" and we've all had or seen them, it _can_ cause problems. Not huge ones, but irratating none the less.
as for the case capacities, yes i do consider 2 full grains a "vast" difference, just as Gill does. when 1/10th of a grain makes a noticable difference, then I definately consider 20 times that amount "vast", but thats just me.
Why you'd want to compare a factory accurised weapon against a standard model is beyond me. Even so i've fired my CETME against national match M1A's (not too many select fire m-14's around here) and done quite well, won some, lost some.
But if you want to do that, i'd compare the NM M-14 agaisnt the PTR-91 or G3A3 both of which are direct decendants of the CETME, or the M21D vs the PSG1, all in all very good matches, thought the PSG1 is a little on the expensive side.
Otherwise i guess we'll just have to agree to disagree, since your not goign to budge my opinion, nor am I yours.
anyways take care and be good.