I've seen the Blackhorn on the shelf at Cabela's for ~37 for a fluffy 10 ozs., whereas they sell American Pioneer Powder for ~$14 a pound.
I only buy APP fffg because I don't shoot with 209 primers, but it's not always in stock as often as the APP ffg and Shockey's Gold ffg is.
With APP, I don't know if you'll be able to load a second shot without swabbing or not, but it doesn't leave a crud ring.
Maybe you can use an easier loading Powerbelt, bare conical bullet or an easier loading sabot for follow up shots.
MMP's 3petal-EZ is their smallest diameter sabot for the easiest loading:
http://www.mmpsabots.com/
Are you using loose 777 or pellets?
The Winchester 777 209 primers are designed to lessen the crud ring because they're not as hot.
The Blackhorn 209 powder can be found here under "Accurate Arms Powders" for $26.65. They also carry the Hodgdon 777 & Pyrodex powders at reduced prices along with the Winchester 777 209 primers too:
http://www.powdervalleyinc.com/index.html