I read his post on that, and my head almost exploded.
MaDuce, go load a 90gr (Berger VLD, cause they're the only ones that make it) into a mag-length round. Unpossible. Can you shoot one through an AR15? Sure, but it's single-shot only, hand-loaded only. Fit one of those long bastards into a case, with a reliable load, stuff it into a mag, and show me a picture of said action.
There are some 75gr projos that wont fit into an AR15 mag. You can make some 80gr specialty bullets fit, if you really do your homework. Sierra Matchking 77gr HPBTs are about the max you're EVER gonna get, and that's EVER. If a more reliable, deadly load was EVER gonna be developed, the .mil brothers would have figured it out a LONG time ago. If you want the baddest load you can replicate, then go after a load that replicates Mk262 ammo, either Mod 0, or Mod 1. I had nothing but MK262 loaded in mags in 2003, for an M4A1 carbine.
If you want a nastier load than that, then try to replicate the 70gr "brown tip optimized" load issued to SOCOM now. It's a Barnes 70gr TSX projo loaded into NATO cases. By the way Barnes quit producing those for commercial purchase based on BATFE guidelines on "armor piercing" ammunition. Good luck finding some, though.