I've kind of developed a liking for Fg Goex powder for my Brown Bess. If I get a horn to accompany her, what diameter hole would be appropriate to let those big granules flow easily from the horn? I've learned that getting Fg through a small hole on a powder flask or the spout that screws onto a powder can can be difficult, as the powder tends to clog up the spout, and I don't want to get a horn which won't handle the larger granules.
