Check out the nifty thing that happens if the mold is closed while still upside down and the flat pins don't get a chance to seat flush, it makes these really wicked noses that isn't quite a meplat but isn't quite a hollow point. (right side of pic)
(It might already have a name and I didn't know that either)
Check out the slugs! This makes an awesome effect out of a 2L bottle of water. The nose explodes and stays in (what is left of) the first jug as a nickel sized piece of aluminum foil (rough size comparison) and the body will go through 2 more jugs. 'Great fun for targets - especially those which look interesting while expanding violently.