Longish, but on the side-subject...
Some people like to avoid corrosive primed rounds. Considering that some of my oldest firearms “grew up” on corrosive-primed ammo, I’m not that picky about it.
Cleaning up after firing corrosive-primed ammunition simply takes an extra step; dissolving the salts that form when the primer compound fires. There’s a technique from the “old ‘03” days that works great with bolt guns: stick the muzzle in a bucket of hot, soapy water, and shove a tight patch down the bore, then “pump” the water up into the barrel and eventually into the chamber and action.
That’s more work than I like, so I go in the other direction - I tightly wrap the muzzle in a plastic bag and pour soapy water down from the chamber. I let it sit for a couple of minutes, then with a “less than tight” patch soaked in soapy water I swab the barrel out good.
“But what about rust from all that water?” Rubbing alcohol goes in after the water, on a soaked patch. No rust. After the scrubbing, I go through the normal solvent-based cleaning process.
It works the same with gas operated guns, but you have to take the gas system apart and clean those parts too. On a Garand, you can do a fine job by just running that soapy water down in the gas cylinder with the muzzle down. It’s easier on AKs (for which there is still plenty of corrosive ammo out there) - just take the gas tube off and wash it.
So anyway, it IS a good idea to know if your ammunition has corrosive primers, but only so you can take that extra step to wash out and neutralize the salts.