LC is GI "like" stuff... it is seconds.... often slightly mixed headstamp... and rejected for some reason.
I bought 1000 rounds, and have mixed emotions. I bought it to shoot, then reload for my AR10.
A bunch of my 2001 lot ruptured the case upon firing, and some had a noticeable crack before even shooting it (I didnt fire those!) At least 5 other members had the same problem.
archive.ar15.com/forums/topic.html?b=3&f=16&t=219468It is a GI projectile, mild steel jacketed, lead core, IIRC. SA surplus is 100% copper last I checked.
It is HOT, and loud... but has been reliable. I continue shoot mine in my AR10... but wont buy anymore, unless everything else runs out.
If reloading is important to you, and you can trust this brass, then its a good deal. If you just want to blast, I would trust SA surp over this any day of the week.