Great in theory. But cops have to unload every time they deliver prisoners to a jail, often when they attend court as witnesses in jurisdictions where only the court bailiffs/judge's bodyguards are allowed to be armed.
Likewise military *green zone* restrictions on carry of a chambered round require hitting the old *clearing barrel* every time you enter or exit.
And frequent maintenance and inspection, daily at least, requires the same. Neither is this a problem limited to crap ammo, though the .40 S&W round commercial loadings seems to be worse about it than most- and are also very sensitive to the overall length of the loaded round during the feeding cycle. There's a real problem here, maybe a couple. There are likely more than one answers to them, too, rather than any one simple one.
When you say "very sensitive to the overall length" what would that be in thousandths?