Copper is a metal.. and are considered a FMJ if they cover the whole bullet. I use FMJ (copper) for deer and they have no problem mushrooming, and imparting a lot of energy in the deer.
people are confusing a steel jacket, or a steel core, and lumping them all together and saying FMJ's are bad..
No, you are confusing a Jacketed soft point bullet, with a Full Metal Jacketed bullet. They are different things.
FMJ bullets have a jacket that covers the entire nose of the bullet, and are designed to NOT expand. There is no exposed lead or plastic tip or opening at the tip of the FMJ bullet. Usually FMJ bullets are used in Military ammo, as the Geneva Convention requires that the ammunition used does not cause "undue suffering" or some such phrase. If you look at a FMJ bullet that has been pulled, or one that has been bought it usually has an opening at the bullet's base, where the core has been inserted into the jacket when it is being made.
That is not taking into account bullets like the Barnes TSX's which are solid copper, but are designed to expand, and are neither FMJ or Jacketed bullets.
Jacketed bullets ARE built with an exposed tip or plastic tip or a hollow point, as the case may be, and the ARE designed to expand. Just because the jacket is metal, and it covers most of the bullet, does not make it a full metal jacket.
It's got nothing to do with what the core is made of. In most provinces (apparently not in bantario, though) hunting with a full metal jacket bullet is prohibited as the bullets do not expand, and thus, do not reliably kill the game animals they are shot at. In some provinces, simply being in possesion of FMJ ammo while hunting,is enough to land you in the sh!t (Manitoba, if one thread is to be believed).
If you have FMJ ammo that reliably expands, post pictures, both of the ammo and of the label of the box it comes in.
Cheers
Trev