I know a lot of people who have them and use 5744, which also means 1680 works but never have met someone who tried it.
The list of powders you can use through them is extensive
I know a lot of people who have them and use 5744, which also means 1680 works but never have met someone who tried it.
The list of powders you can use through them is extensive
Do not assume that because you find a powder with a similar burn rate, that you can use it in a smokeless ML. In this case, 1680 is too fine. Its a spherical powder, and it's plenty small enough to fit through the hole in the 10ML's ventliner. Bad things can happen in a smokeless ML if you get powder on the primer side of the ventliner. VihtaVuori N110 would be an excellent substitute, as is the aforementioned 5744. It really depends on the bullet weight though. I could make more specific recommendations if I had more information regarding this specific application.