This has been discussed occasionally for years, but I though a newer update on the subject might be in order here and now.
Who uses the ultra slow burners like WCC-870, et al, with or without "priming charges" of very small amounts of faster burning powders against the primer? What are your observations with regard to accuracy, velocity, unburned powder in the bore, and anything else you care to note or opine on. With these powders being available and cheap, they're becoming an attractive alternative to me, but I've never tried them.
Thought others may be considering same, and that this might help some of us shoot more economically as well as broaden our horizons a bit? One old friend who was an avid cast shooter doted on these type loads. I just never got my round tuit to try them. What can you guys report?