CharlesT - yep, would be my first choice - but for the rifle at hand, it has a scope mounted with Parker Hale A 20 and A21 bases - so charger loading is not an option, in this case.
I do have 5 or 6 303 British chargers on hand - likely have had them 10 years or more - I am not sure of their country of origin, but I have made myself familiar enough with how they work - similar for some various Mausers, as well.
My intention is for a pouch to attach to a padded carry case - rifle will be in the case - I want a pouch with magazine / ammunition attached to that case, so if I have the rifle case, I also have a magazine and ammo for it. No intention to carry a spare for reloading - is for my "have to walk home through Manitoba bush" rifle - to be on board my side-by-side until I break down or get stuck. Too many wild things in the bush here - I would prefer to walk home carrying a loaded rifle - carry case and pouch will stay behind with the side-by-side.