God..
Two seperate molds, one mold for the bullet body with milled section down the center for a cylindrical pin insert about .250/.300 deep , one mold for the football with a milled section down the center of the football for a cylindrical pin insert which would leave a hole thru the football.
NOW, lets cast both, not burning ourselves, or losing pins as our fingers smoke, and assemble with a lead or brass wire rivet loctited into the base, now we can slide the football down the wire rivet, put both assembled parts in that handy little machine we just happened to make up in our spare time and spin the rivet over the top of the football.
If everything goes well the football spins and we all say "cool".
OK, whos going to shoot this critter ??
You know all wise cracks aside, it could be done. I'm not sure why, but it is doable..
We've made sillier, more labor intensive stuff at work.
I'll wind up drawing something up, I just know it. I can't help myself. I need counseling.