OK, Kurt, I will open that can.

But, before I begin, let me echo the other's comments. Nice shooting!

Thank you Ed, but it's more of a rifle thing then me.

Four questions about fouling;
1. Do these powders exhibit vastly different fouling characteristics?

Not vastly but there is a difference.

2. Are any of those characteristics sufficiently toilsome to cause one to avoid that powder?

No. Just control the fouling.

3. Do the obnoxious (my term) powder(s) have benefits that cause them to stay in the game, in spite of the issues?

All powders have a problem when it gets hot, that's why the blow tube gets put asside and wiping sticks come out. Swiss and the Schuetzen I find that I have to quit using the B-tube sooner then the KIK no matter what lube I use.

4. Is there any way to remedy, or lessen those bad characteristics?

Control the fouling.

OK, now that I've stirred the pot, what flux should be used?

Well I like and use Rosin flux

Ed