4-Bore recoil in slow-motion

For your viewing pleasure (or pain!)
https://youtube.com/shorts/ogypfn_pb...FQKmHcwZWJ2lzj

Watched this a while ago really is good watching

I cast some projectiles for a customer's 4 Bore Percussion muzzle loader this is a picture of them
Attachment 262788
The round ball is 1145 grains the bullet is 1523 grains the skinny one is a .314" 210 grain
load data starts at 200 grains of Black Powder.

What is exact diameter of slug and does it have a hollow base AKA a minie slug also diameter of round ball?
Cost in pure lead would be good to know.Was interested as muzzle loading 4 Bore.

https://www.youtube.com/watch?v=0BOoxj2m8kw

Awesome video.

I don't have the molds; I just cast them and gave them back to the owner, and they are like a minie slug but the hollow base is shallow,
the Bullet mold was from South Africa and the round ball mold from the UK you would have to measure your bore and have molds made to suit.