If they are Remington factory loads, that is probably correct. These bullets were sometimes refered to as metal capped, because none (or very little) of the bearing surface is jacketed. The exposed lead is very soft. If you shoot them, be prepaired to do a little bore scrubbing.

These things were directed at the highway patrol and rual police market to give improved performance against auto bodies.

We read constantly about "new" bullets that give improved performance against targets protected by intermediate barriers. We tend to think that we are dealing with new issues that came to light only after that sad business in Miami, and other such incidents. The truth is that the latest "wonder bullet" is just another attempt to solve problems that have been recognized since the 1930's.

Depending on manufactured date, etc., they might have a little collector's value.