Lee Handloader, same caliber
If what you're talking about is the lee loader kit that uses a hammer to do the various steps, then you are correct. The ONLY way to tell is to try it. You MIGHT get lucky, they might fit okay just being neck sized.
If you already have a press, then the lee RGB dies are very inexpensive and have a FL sizer. OOPS, they don't make a RGB for the russian, just the pacesetter dies.