AMM1851, I know you're thing about making a new shooting bag and I thought I would throw this out for you to consider.
The following bag was gifted me by our own John Shorb (Bigsmoke) six or eight years back...I told him I had never owned a "nice" bag, in fact, nothing other than the old one I had made myself back in the 70's, which is kinda okay, but nothing fancy. Just plain Jane utility.
This little bag is only 7.5" x 7" (about the size of a "belt-bag") and it is compartmentalized John's description, not mine...John likes to use big guns and big words, and he's pretty good at both.....lol)
The little red ball at the bottom of the flap is the neatest thing I have come across in a long time.
It is about 2 ounces in weight and flattened on one side.
Its purpose is obviously to hold the flap down, yet still have the flap and the contents of the bag readily accessible.
The Powder Horn, made by our own Griz, is anchored on the straps with sliced antler buttons, and hangs about 1/2" above the flap...so it's never in the way when reaching inside the bag.
Also, this little bag is "double gusseted" meaning, it's like two bags, sewn together at the top.
Don't know why that is unless, it's that way to help separated the two inner pockets when reaching inside to get your other "stuff". I simply don't know.
If John Shorb should see this he might be able to enlighten us a bit as to the reason for "two" bags acting as one.
Anyway, I hope this gives you some ideas in building your own new bag.
(Forgive me for the dust that shows up in some of the pictures.
Normally this Flintlock and Bag hang on the wall with some other memorabilia, and I didn't take the time to wipe 'em down and clean 'em up.) Notice the red ball, it works like a charm in keeping the flap closed without a "button".
The "compartments" inside the bag includes a small cut-away compartment for flints or caps.
This feature is really neat, having that thick curved portion, very easy to find small things inside without having to look in the bag.
And then there is the "Double Pouch" itself.
A feature I have never seen on another bag and I would appreciate someone explain it's function.
In my heart I know it is that way for a purpose, this entire bag was built by a very knowledgeable person, and it was not built that way just because the builder had some extra leather.
Double gusseted, with about 1.5" gussets each side, obviously for expansion, both beautifully sewn, but why two?
Uncle Russ...