ROFLMAO ~~ Memory Lane Here We Come ~~
San Angelo, 1981, Alice Street Rental Property, SFC Erskine has bought his very first CVA Black Powder rifle. It's a .50 Mountain Rifle. It's a kit rifle and needs a new hammer spring so got rebuilt. I'm loving every minute and decide Step-Dad should have this rifle. Step Dad lives in Virginia which is brushy country and me thinks, I should cut this 32 inch barrel back 10 inches to lighten the rifle before I send it to him and while I'm in there I should clean out the breech plug and check the breech since the gun was bought used at a gun show.
Tear the rifle down, do the cutting clean things up and put a new hot brown finish on things. Rifle is ready to ship but hain't been proofed

Pay attention now this is where it gets fun

No really. How am I gonna test this thing? Ok I'll put it in a vice in the cinder block garage and stack up a pile of 4x4s against the back wall! That'll work! So ... But what charge would be a good test charge? Well, a double charge with two balls should do it! Nobody would ever load three charges by mistake! So yeah 200 grains of Pyrodex RS with two 170 grain .490 balls on top. THAT'S the ticket.
But how to set this thing off. If it explodes you don't want to be in there. I know! Close everything up nice and tight and run a long run of fishing line out side the shop!
About three minutes later the neighbor across the 4 lane street is standing on her front porch looking up and down the street trying to figure out what she just heard.



I'm hiding in the house watching her.



She goes into her house and I scurry out to the garage. I lift the garage door and this cloud rolls out! Looks like there was a THUNDER STORM in the garage! The barrel is still in the vice but the vice was attached to a table which is flipped over backwards. Barrel is ok so no worries there. Two lead balls went through TWO 4x4s a cinder block wall and into a pile of lumber behind the garage never to be seen again! Awesome! And to top it off the neighbors never figured out what it was! No flashy lights came to the house.
As a side note, that now 6 pound fifty caliber rifle was soon nicknamed "The Mule".

It could burn 60 grains of Pyrodex RS under that 170 grain ball for 1650 fps and just a bit over 1000 fpe. but when you wanted to show someone why it was called the mule you'd load it with 90 grains of RS and a 370 grain maxi-ball. Uncle Tom didn't think much of that experience but he's the one that said the rifle didn't kick much...
Still have that rifle and it still puts three on a playing card at 50 yards with the irons.