Under certain conditions a pointed bullet can be reshaped to the same caliber, different point, in a point forming (PF) die. Usually this involves drawing it to .005" or so below it's specified diameter, and then dropping it into the PF die and cycling the handle. A good bullet die maker can tell you if it's possible if you can tell him what brand/nose shape you'll be using as the parent, and what nose shape you want to attain. If it's a 'go' he'll ask you to provide 10-15 rounds as test bullets, and then take the usual 8-14 months to make the die. ( yes... you have to get in line, and each die does take a long time just by itself).
CH/4D can probably make the bullet reducing die you'll need within 6 weeks or so, but I doubt if they can fabricate a .323" PF FN die. I suspect that RCE could, and would do it in a reloading press type die form if you would accept that it probably wouldn't be guaranteed to do anything other than produce FN bullets from factory made pointed ones. Call Richard at RCE and get the story from 'THE' expert.
A much easier way is to have some swager make you a 8mm 4S or 6S bullet about 15 grains heavier than you want with a big Lead Tip, and just file the tip flat at about .25"d. A 4S or 6S PF die is quite common.