Just make sure you sort all the ammo to make sure it is what it is supposed to be. But it sounds like you will be doing that if you are going to shoot by company.

I would sort by brand name, and look at each round to ensure it was indeed 9mm. The only problem is you might have different models of particualr brand of ammo and I'm not sure the case will say that or not. This will effect how they shoot out of your gun.

The only advice I have is be safe.

Paul