Great story DD and nice pics too. Mike and I are going to work on a mold for the 1.067" bore Parrott Rifle soon. We are tired of standing in from of that lathe, turning all those 12L14 steel bullets! Rather be in the backyard in nice weather casting lead ones.
About the only effect on targets other than holes in paper, are the steel plates we have punched or tried to. We posted some of these pics about a year ago, but they are the best of the lot, so here goes. The cannon was a test barrel from experiments to see if the 1/6th scale 7" Treble-Banded Brooke Rifle's rifling was any good. It was on the second one. We used this 2nd proto to do the PROOF TEST of the tube and chamber design. We send a 9 oz. bolt made of S7 tool steel at 57 on the Rockwell "C" Scale with a 12L14 sabot to take the rifling into a 12" X 12" X 1" thick piece of Boiler Plate Steel. The target was two feet from the muzzle at about 2 feet below the soil surface.
More fun that water jugs and you get a souvenir too. Mike and Tracy
The cannon tube test rig with 9 oz. bolt and brass measure (1,555 grains BP), about 2.5 times the maximum scale service load of 648 gr.
The 40 lb. plate was pushed back when hit with about 22, 000 ft. lbs. of energy. We figure that bolt was going at least 1,600 fps.
You can see here that the bolt hit bent the whole plate a bit and penetrated about 80% of the 1" thickness. Also it pushed a plug of plate steel out the backside, shown here on the ground.
The ejected plug of plate steel and the destroyed front of the bolt. Maybe harden to 53 Rc next time?
The remains of the bolt fell out of the hole with most of the shards coming from the half on the left. You can see how it broke along a "Plane of Weakness" in which the anti-rotation pins (2), AND the sabot holding bolt lie. Good book if you like artillery testing stories.