I remember reading some articles in late 2012 on the Mk262 and Mk318 rounds. And one of them was specifically designed for better barrier penetration, but I can't remember which. I can't seem to find the article again, and I checked Wikipedia and it wasn't any help. I can ascertain from my quick reading that the Mk262 by Blackhills is supposed to be used from a 18" SPR and is optimized out to 700yards and the Mk318 is just an improved M855. Not that this is very important, I just can't remember for the life of me which is which.
Thanks, guys!
Thanks, guys!