Too many folks with good results from RL19 that I know...
BUT there are a lot of folks that think IMR or H is the only powder out there, and gun rags don't help things at times.... Plus the old fuddy duddy network.
RL has had some of the better powders I've used over the years, so much so that my bench that read and didn't know so much started with almost all IMR/ WW powders, and now has almost all RL and VV powders....