Hello, everyone.   I am working with an original Ballard No.3 in .25-25 Stevens.  This has the cast action so I am using 3FG Swiss..This has proved more accurate than the 1 1/2 Swiss I tried.
    I have tried SR4759 as a priming charge to reduce fouling and the need to wet-patch after each shot..blow-tubing in this small bore doesn't cut it alone.
   I went up to 2.0grs. with the 4759..bore still dirty..grooves filled with fouling.  Had to stop there as pressure signs started..using 22.0gr. up to 24gr. Swiss.
    Tried PB..this powder is recommended in the NRA Handbook.
Using 1.0gr. PB next to primer, & 22.0gr. 3FG Swiss..bore was left clean..even in grooves..I will have to adjust charges for best accuracy but this powder shows promise.
    I understand single-base powders are best for du-plex..as dbl. base are oxigen starved.  Have any of you tried any other smokeless powders for du-plexing?
   I have American Select shotgun..very clean burning & single base..a bit faster than PB though..but some have recommended Red Dot..which is much faster..any comments?  Thanks.