Ben_Rumson: Thank you for info. I will try the poly disk as soon as I can locate something to cut the proper size disk.

Any recommendations for the most likely to be suitable powders?

The sizing of the bullets seemed to be about right. The drive bands ranged from 0.309 to 0.310+in. None of the nose got to 0.300in. The Model 1899 slugged at 0.3000in and 0.3080in. The Marlins about 0.3095in. When I got leading without sizing I sized to make them more uniform, 0.309 for the Mod 1899...

Quite a while ago I found an article "by Paco" entitled "Small Charges in Standard Cartridge Cases: Cast". In it I found "A Paco Secret" that said a small disk of bullet size, thin polypropylene glued to the base stopped fouling. Since the technique said to tap the base...