I use the 125 grain. I like the 125 SST, 125 Nosler Ballistic Tip, and 115 Berger. I have shot many pigs, deer, and coyotes with these 125 bullets. The 110 grain Barnes is a good one for sure, just a little expensive for AR volume shooting. The 125 grain bullets offer perfect mushroom shaped expansion with deep penetration. The bullets I have recovered (if it didn't exit), were caught on the far side skin were perfect mushroom shaped. Most exit though. I have also used the 115 Berger. I like this one because it's fast with a thick copper target jacket. I get a pass through every time. I shot some pigs night hunting with it, and they immediately didn't like it!
If you need some, let me know. The blk out is one of my top sellers, and is faster than any factory ammo.
https://dallasreloads.com/product-category/rifle-ammo/300-black-out/