Ask him to peel it out and stick a caliper on it. My guess is 147gr. 9mm or 180gr. .40. I think a 10mm would have more penetration, but it's a guess.
Tell him to keep it as is, just get a rough idea. It looks cool, no need to destroy it for verification.
Uggggg! It really is an hour! I clicked hoping it was the wood catagory that recently aired. Oh well......
Really? A wood category on Jeopardy? Was one of the questions 'What is 'I wish it was bigger', Alex'? Sorry, getting late here. Brian