For metering through the LEE Autodisc, I'd have to suggest trying two powders I haven't used: Ramshot TAC and Accurate 2520. I know a High Master who uses 2520 for his short line ammo (200-300) because he loads on a progressive. I'm tempted to try TAC because I wish to load my short line ammo on a progressive myself, and my local shop doesn't carry Accurate (I don't think he does anyway) but he does have Ramshot.
BUT, right now I'm burning through an 8-lb keg of Varget in .223. I've had so many good results with it, I can't bring myself to switch. Also good is RL-15. I cut my first LEG points using ammo loaded with that powder and Remington 7.5 primers. And H4895 does well as well, but the soot seems to be a lot harder to clean off the cases after.
Whatever you do, DO NOT use anything like W-748 for 69-80gr .223 loads. I found it absolutely unsuitable in temperatures over 75-80*, with lots of pierced primers from a load that was actually very mild (2650-2700 fps with a 69gr Nosler). Your bolt face and firing pins will thank me... :banghead: (The irony is my go-to 52gr load for shooting at 100-yards is a stiff dose of W-748 and a CCI-450 primer.)