Using the right bullet for the job is important. 454190 was intended for revolvers. The 32 Big lube was intended for small pocket pistols. The Big Lube DD moulds work fine for CAS shooting, but with the big flat meplats they aren't very aerodynamic, and mostly suck at real long range shooting. I have most every DD mould made, some of them I designed myself, but I also have many Accurate Molds, as I don't only shoot CAS events. Bullet fit is important, but also having a bullet soft enough for BP shooting also helps. I have a 38-55 rifle that I got for a very good deal as the shooter was using hard, too small, skimpily lubed bullets and couldn't hit the side of a barn with it. I just used a softer better lubed bullet and it now works great.
As for lube, there are many good recipes out there, but if there just isn't enough for BP use it won't matter what you use. If you have a large enough lube groove it almost anything will work as long as it keeps the fouling soft.