Finally scored with this bullet.... well my son did.
We finally got to use the NOE 510-380-HB (Great Plains) bullet on something besides paper. After walking around in the swamp for 6 hours in search of turkey or a hog I finally spied a small pair of piglettes that I decided would vaporize if I shot one with the 50 cal slug I had lined up with it's shoulder. We tried to sneak up on them so I handed off the ML to my son and let him play stalk hunter with them. Shortly thereafter I hear the BOOM and a shoutout that he got him. Going in I see he has pulled the 1851 Old Navy and had it trained on something larger than the piglettes we were stalking until it finished it's Curly SHuffle. Come to find out he was stalking the little ones when he heard something coming through the Palmetos when a good size boar appeared heading straight for him. Only shot was head on so he lined up and fired hitting right below it's left eye. What a nice clean 50 cal hole it made.
During the processing I found the remains of the slug just short of the third rear rib on the inside of the rib cage in a blood bubble. Looks like the slug entered through the left side of the skull and passed through the neck chipping a couple vertebrate. It continued into the chest cavity liquefying the right lung and stopped on the inside of the rib cage. Bullet passed through 19" of hog which include skull bone.
The recovered slug measured .998" at it's widest and .688 at the narrowest. Final weight was 294.1 and started life as 382.8gr cast from pure soft lead and a little tin as the HB version and powder coated with smoke's red. Loaded over 60gr of Blackhorn 209 after being pushed through a Lee .510 die to allow it to be loaded. The ML is an old CVA Wolf that has taken many critters over the years using all kinds of different projectiles but will likely only shoot these from this point on.
And here are a few pictures of the harvest and bullets: