Would retumbo work in the badger 1.0?
You can make about any powder "work" it just may not work well and won't give you the velocity something like this is capable of. The more overbore something is, the slower the powder needs to be. US869 not only burns like wet coal, but it's a ball powder so there is generally no issue with getting enough of it in the case like there is with stick powders. RL33 is fairly slow and could maybe be a suitable choice, but I'd bet US869 will out do it with regard to velocity, and lets face it, that's the whole reason we build these fire breathing dragons, so we can push bullets faster or push a heavier bullet as fast or faster than a lighter one.