Just felt like sticking this up on FA. When my grandad passed away last year he left me these; a pair of the bullets you see here and two empty casings for them, a ceramic tankard he bought the day of my birth for me to keep as an heirloom, it depicts a spitfire from WWII.

I've measured this thing and got the stats of it. It's bullet is an RG-86 30mm cannon round. The bullet alone is 4 inches long and weighs 8oz. This thing hit over 2500fps when fired giving it a massive kinetic energy (about twenty times the power of a 50cal I believe). I'm assuming that's an armour piercing tip as it's a much harder metal than the rest of the round. Overall it's 8 inches long.
I now use these pair as props for a character I play, a vampire gunsmith named Viktor Mortis. When someone asks what's the best he can make he hands them one of those and smiles.