When I bought my first firearm as an adult (1993-ish?), a revolver, wad-cutters were common in most stores that sold ammo near me. I practiced with them because they cut perfect holes in targets that were easy to see (long before splatter targets). I haven't seen a wad-cutter/full-flat-nose...
Research is your friend. Lots of time...lots of sources. Written, video, chats...
I've heard sonic cleaners can be life-savers for some suppressors, maybe not for all.
Keep in mind, I'm not an owner or user of a suppressor. Just absorbed stuff over the years.