Oh, that’s a most important safety issue, matching your specific ammunition to the specifications of your firearm, besides reading the manufacturer’s manual of instructions for your firearm, or looking it up online.
Somewhere on most firearms the ammunition specifications are stamped into the frame / slide / barrel, ejection port cover, some place…
9mmX19mm, not just the diameter, but length must match, this being the most common modern dimensions, some older 9mm was shorter.
If your firearm is rated to tolerate higher pressures like: +P or +P+, you don’t have to use higher pressure +/++ but, if you wish to, make sure that it will not damage your firearm, or risk injury using that.
Be sure to use only 1+, and not 2++ unless it is rated for 2++.
Also, match Lugar, or Para is equivalent.
NATO is FMJ, not JHP.
Pay attention to details.
Save on damaging your firearm, and / or yourself.
Make one-to-one comparisons, and make sure everything matches the same.
Other common head-stamps indicate manufacturers and caliber:
like S&W Smith & Wesson .38SP (special) or .40 cal.
And, .45APC Automatic Pistol Colt
There are hundreds to thousands of them…
Most manufacturers put out a lot of different calibers.
As, do a lot of different manufacturers put out the same calibers.
Use what your firearm manufacturer recommends.