I think there's been a lot of confusion between shooting bags and possibles bags. Starting out in the 1970's I had a big old possibles bag with everything in it. I was like a woman trying to find her lipstick, digging in that thing. For shooting, I now want a bag about 7"x9" at most, with an inner pouch for the lead balls, knife on the strap, powder measure hanging pn the strap, and powder hown staps integral. Patches, balls, are about all I want in there. Then reloading is no chore and very efficient.
I'll carry a haversack etc for all the other junk. That's sit-down work, cleaning a gun, disassembling, castin balls, etc.