In my bushmaster, I've had the best luck with wolf 55 hp ammo. I know it's dirty, but I've never had a casing lodge in there, just a few jams. I've shot lots of winchester and federal .223/ 5.56mm with nothing but problems. I think winchester is more of shitty ammo all the way around. my glock, springfield, smith and wessen all hated it.
I'm sure i'll get hated, but my M4 likes wolf ammo, and it's accurate. and it's hard to beat the price to just go out and shoot for fun.
I won't shoot wolf in my handguns though, sellier and bellot all the way.