With revolvers, I load directly from the flask. Chances of having it go ka-boom are a lot less than winning the lottery.
With single shot rifles and pistols, I use a funnel topped powder measure like in MCBs post, or an elk antler tip drilled out to a preset amount.
Fingers (Show Me MO smoke) McGee - AKA Man of Many Colts - Alter ego of Diabolical Ken; SASS Regulator 28564-L-TG; Rangemaster and stage writer extraordinaire; Frontiersman, Pistoleer, NRA Endowment Life, NMLRA, SAF, CCRKBA, STORM 327, SV115; Charter member, Central Ozarks Western Shooters
Cynic: A blackguard whose faulty vision see things as they are, not as they should be. Ambrose Bierce