A scale to measure BP or substitutes is really not required. Always measure by volume.

That said,I do use a scale sometimesto "optimize" my best volume measured loads because the scale does not alter (hopefully). That way when it comes time to get ready for a hunt and a particular load, all i have to do is weigh out my first volume developed loads and put them in speed loaders.

For range shooting, I have also weighted out my pet loads and put into 20-30 film cannisters for quick and consistant loads.

But to re-visit. Black powder and Substitutes are measured by volume not weight.

Tahquamenon