Bi Metal?
That means two metals, right? Aren't ALL jacketed bullets bi-metal?
Pretty sloppy term if what you are referring to is steel jackets or steel cores.
Pretty much any rifle round legal to hunt deer with in the US will punch through a pistol rated vest without really noticing it is there.
A lot of them will do a serious job of trying to get through a rifle rated vest. Some will make it, too.
Lots of nations have used tungsten for AP bullet cores. It works better than steel for that. But steel is much cheaper, and can work acceptably well against light armor & vests.
That means two metals, right? Aren't ALL jacketed bullets bi-metal?
Pretty sloppy term if what you are referring to is steel jackets or steel cores.
Pretty much any rifle round legal to hunt deer with in the US will punch through a pistol rated vest without really noticing it is there.
A lot of them will do a serious job of trying to get through a rifle rated vest. Some will make it, too.
Lots of nations have used tungsten for AP bullet cores. It works better than steel for that. But steel is much cheaper, and can work acceptably well against light armor & vests.