FWIW; I've always tried to impress on new reloaders to be safe, learn safe methods right from the start. I do not rely on powder density to be safe as I look in every case I've charged before I seat a bullet. Just a habit with me.

I use a lot of Universal now for my 9mm, 38 Special, 357 Mag, 44 Specials and Mags, and 45 ACP. When loaded to mid or upper levels, as most powders, it burns clean (something that means nothing in my reloading world as I clean my guns after each range session)..