I just bought a Ruger EC9S, 9mm, its not much bigger than his 25 or 22
I wish someone would make a 7.65x19 and conversions for 9mm guns. Run the cartridge up to ~30k PSI and I’d bet you could Chuck 85 or 90gr JHP at around 1050fps out of a 3.5” barrel. Basically a 32NAA, but the advantage being a smaller diameter case, rather than necked down 380. So you’d increase your capacity more.
Rather than a micro 9 or 380 with 6-7 rounds, you could fit 8-9 rounds.
FWIW , you're describing the ballistics of .32 H&R Magnum .
Now I want a .327 Federal magnum. Actually I've wanted one since they hit the market, I'm just reminded of it now.
Better watch what you ask for. The .327 FM never took off too well and ammo is only made as special runs. .32 Long is probably going to be around a long time since it is used in many competition pistols.
Regardless, once someone starts getting holes poked in them, most often then not, they'll leave you alone.