Okay. That's a fair answer.
All I've noticed is that BL-C (2) has generally given me more variability in velocities than other powders, specifically H4895. I've generally used BL-C(2) for .223 blasting ammo that I run through the progressive.
Outside of that, BL-C (2) is one of those powders that's been on my shelf since I got started. There always seems to be a listing for it, no matter what I'm loading.
I've been reading this thread with interest. I'm currently resurrecting a Savage 340 for coyote hunting, and I have 55 grain Hornady SP and I just ordered some 52 grain Speer HPs as well as BL-C (2), Varget, and CFE223 to replenish the larder.
BL-C (2) is so close to Winchester 748 I tend to get what is available and best price. I use it in .308 and 30-06. Unfortunately, I don't think either give me the best accuracy. That would be Varget. For .223 it is H335, AA2015, RL10x, AA2230 and AA2460.
kwg