This is a discussion on No NM stamped on barrel within the The M14 forums, part of the M14 M1A Forum category; My new to me Springfield NM M1A does not have "NM" stamped on the barrel. I called Springfield and they said it left the armory ...
Just so you are in the know, USGI M-14 barrels and Wilson med weight barrels thats SAI installs on there M1A line of loaded rifles will have a NM for GI barrels or NM308 on the Wilson barrel.
All other barrels that SAI may install on a rifle may only have a makers name or a makers mark and be devoid of any NM stamp that you are looking for. Dougless/Barnett as far as I'm aware lists only # of twist and # of groove, month and year made, Krieger puts there name and all the same info plus the steel lot #'s.
So if you have a Med wieght barrel and the only info is # of twist and groove with month/year its a safe bet its a Dougles/Barnett barrel.
Springfield Armory Inc.(Genieso IL) is not the same Springfield Armory in Springfield Mass.
What's the difference between a National Match barrel and a standard barrel beside the weight/contour?
Also, I was told that I wasted my money buying a match grade stainless steel barrel for my AR15. Was told that a plain match grade steel barrel was just as good and would last longer. This came from a well known black rifle forum that has a lot of armchair competitive shooters.
I was thinking maybe down the road if I need to rebarrel my M1A I woulld give the stainless barrel some real thought.
Do you get less competitive rounds through a stainless barrel?
Someone correct me if I'm wrong, but I believe you should get roughly the same service life out of a stainless match and steel match grade barrel. The difference being that the stainless barrel will capable of holding tighter groups and give it all up at once, as opposed to a standard steel barrel that will have shot groups grow larger over time.
Digger658, N.M. barrels are held too tighter internal dementions than a standard barrel. There's more but thats the jest in a nutshell.
Ramseyn, you heard correct, steal tubes Vrs. SS tubes last about the same amount for rounds down range in a competitive rifle when a SS barrel is shot out its done and you will know! shots with be off call all the time. When a steal barrel is toasted it will be off and on leaving the shooter scratching his head what the .......... When the barrel is shot out I want too know and not be guessing is it or is it not? Thats why I went SS.
SS barrels have that showie look that I like if the shine is a bother too you, you could have it glass beaded it will take a matte or haze gray look, Steal barrels have that stealth/stock look, so its what YOU like/want not what the other guy tries too push on you.