FWIW go online and find a link to "homemade firearms products" and look up Ed's Red Cleaner. Cheap to make and works like a dream. Just plan on cleaning your firearms after shooting them and all will be well!
My two cents from decades of reloading ....
Using the same bullets (Speer 148 gr HBWC) and the same firearms (Clark .38 spl LSHB and S&W M14), I've progressed from BullsEye to W231 to AA2, each time getting less residue in the barrel.
VV and Clays are improvements in "clean burning", but now I've settled on WST (Winchester Super Target).
MG, can you tell me your receipe for WST with your 148 HBWC equivalent to the standard 2.8 Bullseye load?
thanks in advance
2.8 BullsEye is equivalent to 3.1 W231 is equivalent to 2.65 WST in my tests. 2.5 gr WST will give a lower pressure and about 680 - 690 fps, while 2.8 gr WST bumps the pressure to 16,000 or so and velocity up to 730 - 740 fps.
Because your barrel length and twist rate may differ from mine, I suggest starting with 2.6 gr WST and dial it in to your equipment.