Using a powder flask, I put my index finger over the spout, invert the flask, press the lever with my thumb, give it a little shake to make sure the powder fills the measure. Then release the lever with your thumb, but keep your fingertip over the spout. The measuring spout should now be full of the designated charge of powder. If it is the first load going in a clean gun, you can then pour the charge directly into the barrel. For all subsequent loads, pour the charge into an oversized powder measure, and then empty that into the gun. The only time you pour from the flask directly into the gun is for your first shot. After that, there is a remote chance of an ember.
Powder flasks can be useful, and help prevent wasting powder as some do by overfilling their measure and "striking off" the top of the charge.
Notchy Bob
Powder flasks can be useful, and help prevent wasting powder as some do by overfilling their measure and "striking off" the top of the charge.
Notchy Bob