I'm not at home right now so I am working from memory and that is not good, but I'm thinking I use Nosler 55gr or 52gr not sure, Ballistic tips. I use all Winchester componets, WSR Primers, Winchester Brass, either Winchester 748 or 760 powder. Off the top of my head I'm not sure. I am sure I got the recipe out of the Hodgen Manual, and it's the one for factory duplication loads.
When you look in the Hodgen manual you will find one load without a starting and max amount of powder, just one load listed, and I have found that load to be the most accurate in my H&R Ultra .223. I do not hesitate to shoot at small stuff, Coyote, Foxes, and Beaver, out to 300 yards.
I honestly have not tried heavier bullets yet. Got some 60, 70, and 80gr bullets to try, just have not got around to it yet.
If you are not into reloading, I find the Ultra Max, remanufactored ammo to be superb in my .223 as well.