Risks of measuring your charge with the spout/suggested charges? (percussion pistol)

[NotDanielBoone]

What is the real amount of powder delivered from a spout? Only weighing them will tell. Drop 10 loads from your spout, using your finger over the opening and your thumb operating the lever (if a flask), and see what you get weighed on a good scale. I have seen spouts that were listed for x grains deliver Y grains, and technique creates variables.

If you have a variable measure, test to see if the markings are even close to the amount of powder marked.

You don't have to worry a lot about over-charges, but consistency is what consistency does....produces tight groups.

ADK Bigfoot

Test your measurers by weighing the charges. Then there's no guessing. I'm not a BP physicist, but if you are off by a couple grains on a 20 grain charge that could be meaningful. I've been told and have read it here that consistency on everything you do with your load and charge will matter.

 

[ZUG]

From what I found shooting my .36 caliber revolvers either Uberti or Pietta is that a charge of between 15 and 20 grains of 3F Goex works well for me using a round ball. I do use a Colt copper style pistol flask and put my finger over the spout. I pour out sample charges from the spout and check them using a powder scale. This does fine for 99% of my casual pistol shooting If you are a master class pistol shot then you are doing it differently.