That stuff is hard to find and if you do find it, it's very expensive. I found Hornady ones in a Wichita Falls gun shop but they wanted $50 a box for it.
Yeah I have to go through my ammo and see just how much 308 MXLR I have left before I decided to pay $50 a box of 20. I've thought about selling gun for the simple reason it's hard to find ammo and when you do it's $20 + more than regular .308, 6.5 Creedmoor, and .270 which seem to be in stock anywhere I go. Hornady 30-30, .35 Remington and 308 MXLR are really hard to find.