Found a new spot and some keepers.

Squar hole is because the bullet was going to be used as a nipple protector. The squar is the squar base of the nipple. You take a minie, cut the top off a bit. place it on the nipple and let the hammer down, after repeated use it forma the mold of the nipple and you have what you have.

Thanks guys. I can’t wait to get back to this spot.