Originally Posted by
Kosh75287
Forgive me if this suggestion is frowned upon or is considered unduly hazardous, but could the fouling be addressed by the use of a "duplex" load? If I understand the term correctly, this involves the use of 0.5 - 2.5 gr. of slow(ish) burning smokeless pistol propellant as part of the total powder charge. I understand the smokeless charge to be introduced first, so that it is closest to the primer flash hole, after which a slightly reduced black powder charge is measured into the case.
On firing, the more brisant smokeless powder acts as an "initiator" for the slower-to-ignite black powder, and elevates temperatures and pressures JUST enough to enable more complete burning. I've HEARD of this, and never tried it. But it seemed like something worth considering, if the fouling is wrecking accuracy to the extent believed.