meketrefe
.450/400 Nitro Ex
The shorter the barrel the 45 with grain makes more sense like a 3" barrel but I would not sacrifice firepower (round count) vs grain.
In a mid and large frame pistol the 9mm starts to make more sense(speed vs grain) specially is you can keep a lighter gun with more firepower up to 18+1 rounds depending where you live or if you are a proviledged citizen.
Or simply pick the one you shoot better with and like the most that is the most important thing specially if you are substantially better with a specific gun and ammo combination.
Train a lot. That is also your top priority.
In a mid and large frame pistol the 9mm starts to make more sense(speed vs grain) specially is you can keep a lighter gun with more firepower up to 18+1 rounds depending where you live or if you are a proviledged citizen.
Or simply pick the one you shoot better with and like the most that is the most important thing specially if you are substantially better with a specific gun and ammo combination.
Train a lot. That is also your top priority.