A carry belt and a copetition belt are ususally different — most use the inner/outer belt for comp — these are really stiff - not for everyday use
I use wilderness systems for an everyday belt
I use double alpha comp belts — the inner outer belts are pretty much the same
I do have a 38” double alpha spare belt here — you are welcome to try it out — 38” belt should be just about right for you
BP has no real airgap - less than 1/6" from what I hear........ so I used a wad with 70gr of BP and crunched it a bit.... YMMV
And yes BP is an EXPLOSIVE - as per @Smokin .50 other powder is a propellant !