I like wolf gold, but have recently been getting federal ae223m at walmart. It shoots equally meh in my guns, just like WG, IMI, and PPU. Perfecta while underpowered seems to be a bit more precise in the 3 guns I shot it out of, doing about a half inch better at 100 yards. M193 types were putting about 2.75moa, and the perfecta was doing around 2.25moa. It's been a while but I think I was getting equivalent performance from freedom munitions 223 reloads.
Usually the WG, IMI, freedom and PPU were bought around 32cpr. While the perfecta was like 30cpr at walmart. I feel most confident with the wolf gold. It tends to shoot the best for me, and runs a few bucks cheaper. PPU is definitely the hottest.
I think the ae223m is exclusive to walmart, where (with ca tax), I walk out the door at 34.7cpr. About equal to paying 32.5cpr online with shipping. So I'm happy. As far as I can tell, it's as close as you can get to m193 without getting brass in your eyes.
Never had any problems with any of the above ammo.
M855 is decent for me when the taxpayers are buying it for me and using an issued rifle. Never had any troubles hitting a B-mod at 500.