Quote Originally Posted by daschnoz View Post
Just about any ball powder should meter well through a powder drop.
For 223:
- W748
- BL-C2
- Accurate 2230
- H335
- Ramshot TAC

Those are some just off the top of my head. If you're loading blasting ammo, pick the powder that costs the least per round to load (dollar per grain * powder charge). It may not be the cheapest per pound, but if you're using a smaller charge for the same performance, it may actually be the more economical powder.
Any of those listed will also do well in your 30-30 with cast bullets , I'm partial to AA 2230