You are correct. When I used "all", that was an absolute...which is almost never supportable.
I read a lot of the smokeless threads, but reply to them only occasionally.
I learned my lesson about SP PP Methodology when I replied to a thread (a long time ago) where a guy was asking which of his greasers he should size down for paper patching. Being unfamiliar with such a novel concept, I suggested he "do it right" and look into a smooth-sided design that casts at the desired diameter. I mentioned the improved aerodynamics as the 'kicker' which made it the only reasonable route.
BOY, did I get my head handed to me!!! I got it from so many sides, I felt like Custer.
So, though I know there are exceptions, to me "all smokeless paper patchers size down greasers for paper patching"...or at least all of the leaders in that methodology appear to.
The glaring exception is 303guy. Not content to squash a greaser from a Lee two-banger...he decides what he thinks he wants, and drills a mould for it.
I don't like any of his bullets, but I sure like his style.
CM