Kill joy, your barrel is a bit long, you might get better results from a 25-30 foot barrel, also, in reality, your best shot from the cannon would probably have a speed of 2000 fps to 2300 fps with a golf ball, which would have the KE of 15,000J-21,000J. You might be able to get better penetration a...

Now enough with the bickering and we need to see the version 3.5 and 4 before the cattle prods come after you

Hey for the version four, you need to connect another 15 foot of the six inch chamber for pure ownage!
Yeah, I want to see the damage!!!!
P.S. I am a spud tech member that rarely post (to give you an hint).