cayugad, you might try varying the amout and type of filler if you are looking for tighter groups. I have played with this from time to time with some vary interesting results, I have a Renagade that will half the group size at a 100yds by putting in 20 gr of corn meal.{with a round ball}Lee

That will be my next step. I think there might be some real accuracy potential using the filler and I do want to experiment more. I never used 20 grains but I am up for about anything.. thanks for the heads up. I will try some of that in my Renegades as well.

I would also wonder how that would work in the field without slowing you down too much. Carry speed loaders with cornmeal only? Or do you think it is really only necessary in target shooting?

txhunter - I'd have to break out my speed loaders and then dump into a see though powder measure to see what the load would look like. This playing with cornmeal loads is fun, and a real learning experience with me. There are a couple more rifles I want to try the same thing with.

What amazed me most was the effect with PRB. I wonder if a filler would allow the use of 777 without burning through patches? I've no 777 or I'd test it myself.

I've read that Cream of Wheat will also remove bore leading. Never had a leaded bore to try it on.

cayugad,well this is a little different but it worked for me.
I take a piece of biodegradable toilet paper[so I can just drop it if I am in a hurry] and put it on a flat surface put the filler on it wrap it up [like a pouch] tie with a thread. I put mine right in the quik loader and if I am loading in a hurry I just twist the part that is tied with the thread off and pour the corn meal or cream of wheat on top the powder.Lee