Fiocchi 9mm Brass 115 gr.is for sale on a site that lists both...the CMT sells for a dollar more. Can anyone explain the difference between Full & Complete cases? Why does it cost more? I've been satisfied running the FMJ thru my Walther PPX.
Thanks.

Typically the FMJ leaves the base of the bullet exposed - TMJ/CMJ covers the ENTIRE bullet, and requires a bit more work & copper.

It's designed as a safety feature to minimize lead exposure, especially for indoor shooting.

Total Metal Jacket Ammo at Ammo.com: TMJ Ammo Explained

Exactly, the the lead core of CMJ is completely plated. The idea of that was to reduce lead exposure.

Thanks much for the explanation. I'll stick with the FMJ.

Not necessarily plated. Some bullets have the conventional full jacket with a base disc covering the lead there. The idea is that it reduces airborne lead levels in enclosed ranges. I never quite bought into that theory.

One of the manufacturers made plated target ammo, might have been Remington. The ammo was fairly inexpensive, not sure if it is still available. Plating lowers lead exposure in most guns.

For a little more I would go with the total metal jacket because the exposed lead base slings molten atomized lead into your gun. Also, if you care about the groundwater, etc, then your aren't contaminating your land as well (if you happen to care ). If you use the total metal encased, then your cleanings are just carbon removal events and of course a little copper.
Additionally if you use a suppressor, your Suppressor doesn't get lead build up.

The majority of lead released upon firing is a result of lead in the primer composition, not the bullet.

OK, good info. I didn't know that.