Might be of interest to all of us caster's if we could post some of the dubious and outright "untruths" we have personally run into and that caused us leaded bores, casting problems, reloading problems, poor accuracy etc, when in pursuit of our hobby.
Advice we read or took that was pure "bull manure" when it comes to our the cast boolit endeavors. And let's keep it informative and civil so we can all benefit from differing experiences we all have had.
I will start with a myth that caused me problems with accuracy and leading when I started with casting many years ago;
"You must size your cast boolits to groove diameter in revolvers." Some writers put this out as a truth, and it gave me big problems in my handguns when I was a novice to casting.
As we now know, it is best to size a boolit to fit the chamber throats of a revolver. And if the throats are smaller than the groove diameter, it usually, but NOT always, hinders cast boolit accuracy and leading to some extent.
As I said in another post, I believe reading some of Mike Venturino's early articles first got me sizing to throat diameters in revolvers and greatly improved my results.