Once again Track of the Wolf has the flask spout.
https://www.trackofthewolf.com/Categories/PartDetail.aspx/70/1/SP-020
Revolvers seem to be the one muzzle loading firearm that loading from a flask is sort of acceptedable.
I use a separate measure such as this one from Deer Creek.
http://www.deercreekproducts.net/store/p1074/Revolver_Powder_Measure_-_A1260.html
https://www.trackofthewolf.com/Categories/PartDetail.aspx/70/1/SP-020
Revolvers seem to be the one muzzle loading firearm that loading from a flask is sort of acceptedable.
I use a separate measure such as this one from Deer Creek.
http://www.deercreekproducts.net/store/p1074/Revolver_Powder_Measure_-_A1260.html