I've used IMR 4320, 748 and BLC-2 had excellent results with all three. At the present time I'm loading BLC-2 as it gives me exceptional accuracy in all three of my rifles in 223 caliber. Be advised there's claims that BLC-2 can ring barrels longer then 20 inches. I'm not concerned with that as all my 223 rifle barrels are 20 inches or shorter.
I have been using H335 for years - it works. I am down to about a pound after loading up all of my 223 this past winter. I have been using CFEpistol with great success in 9mm and 45. I also have a buddy that has been praising CFE223 and plan to try it out next time I load 223.
I load 223 every other year. I only shoot about 2k per year and I have about 5k of brass.
I reload for .308 and .223. I can use w748 for both, and it works well, and meters very well. I tried H335 and it produced a huge fireball, so I went back to w748.