I have some old (probably expired) Malt o Meal that I just found, sorting through stuff; I'd bought fresh COW in case that's needed, but IDK, I am thinking that maybe the MoM should do the job? In past I've used a powder charge, then almost case full of COW, then a small over COW wad to keep it retained, used to use plastic but I'd think paper would do it. I cannot think there'd be a real problem with the MoM, unless anyone has experienced bad results with that? (I'd load and fire same day probably for minimal powder/MoM interaction.)