358156 hp
At large, whereabouts unknown.
I believe the NRA cast book mentions tapping the mould as soon as you fill it. They say it helps the trapped air to come to the top and vent. I don't do it.
I've seen a number of moulds at auction that had evidently been tapped (a lot) on the side of the blocks on the right side with what I presume was a ladle. Some were pretty dinged up, and all of them in the same exact area. I never bid on a single one of them for obvious reasons.