Picked this little shotgun up at auction and am looking for help with working up loads.
It is a Belgian gun chambered in 10.7 mm which I take to be 44XL shot.
I have yet to do a chamber cast but I see a 303 and 38-40 cases drop in and it looks like headspace is good with either.
So, I’m looking for ideas of what to use as a base brass. Don’t have any 44mag brass and guess that would be the one to try.

When I say it is little, I mean it is TINY!!