As a SASS shooter, I shoot 44WCF in all my main match guns except a lone 38WCF pistol, they are all loaded with various black powders, including 12g shotgun (I use whatever is cheapest for SASS). Currently I've been loading cannon powder in 44WCF. Its dirty but gets the job done.
I've been buying bullets of .428 size, even though my barrels are all .429, its not a problem at 20-30 feet! Even accurate to 100yds in a model 92 for "long range pistol caliber". I've used multiple bullets in the past 2 years, recently some Big Lube's that worked well for the ranges I shoot. I hate having to order bullets and am already casting 535gn Postels form my Sharps so I decided to cast 44wFC as well. I bought a Lyman 429666, as it has a generous lube grove (homemade lube) but not too big like the Big Lube's and 200gn weight. I cast my first 100 last night and they are dropping between .429 and .430. I dont think I need to size these bullets (Hard Cast, re-purposed 44 SWC's, not pure lead). Opinions and why? I have ran .429 bullets through them from a friends belt with no issues.