Any idea what velocity this Bl-C load is producing in your rifles?
I'm thinking that any powder close to Bl-C(2)'s burning rate that produces similar velocities will be a good place to start looking for the load that will work in my rifle. These would be AA2230, WW 748, H-322 and -335. Also the DATA powders which are also close, like 2200 and 320. This is basicly the OCW load school of thought, which I have found to be working in several 223 rifles I have made varmint ammo for.
I hope I'm right because I have several kegs of this type powder but no Bl-C(2).