20 + years ago I inherited my father in laws Government 1911 plus his stash of ammo. The ammo was put away in a closet and forgotten untill recently. The ammo included a box of NORMA hollow points. NORMA hasn't made pistol ammo for several years. Also several boxes of Olin Mathieson, also known as WRA (Winchester Repeating Arms) and WCC (Winchester Cartridge Company, noted on the box and headstamp. Headstamps indicate date of manufacture are 64, 68, and 69. These are FMJ GI, in military issue boxes.
Last week I took a few of mags of NORMA to an indoor range just to see how the function in my Kimber and Wilson. On the 3rd shot I saw sparks down range where the round skipped off the concrete floor. Sure enough, a magnet detected a steel core. These hollow points are of the old design with a ring of exposed lead surrounding the cavity. The range owner frowns on steel cored projectiles.
Today I loaded my mags with WRA 68 rounds and went to the same range. I'll be damned!! Sparks flying again. Sure enough, the magnet does not lie, steel cores. As soon as I got home I checked all the boxes and found all the 68s are steel but the 64s and 69s are not.
I would have never thought US military ammo would have been steel core in 1968.
This is the Norma. The lead is only the ring around the cavity.