HEh. try getting non-steel case 308/7.62 even on ammoseek.com
I know. My AR dislikes steel case.
Adding to that ... WITH the grain bullet you seek.
200, 240 grain subsonic 308 is great for hog hunting with a suppressor. They don’t spook when you shoot the first one.
Trouble is, those rounds carry the street rep of being “sniper rounds”. Sigh. Gotta love Hollywood.