Water filled shot

[GGaskill]

I think the idea of making the round with an equal weight in water was genius, makes we wonder why nobody has ever done that since.
Opinions?

I have done just that.  Here are some precautions.  When I first started (1974-75) I filled soda cans with water and fired them from my first mortar.  If the charge was increased a little the can would flex (hydraulic pressure) and contact the sides of the bore.  Increased charge a little more and the can would split along the side.  Could the round seal enough for an instant of time to raise the pressure to unsafe levels?  I'M NOT GOING TO TRY, as I have seen a cannon explode from 15' away.

I thought it important to include a note of safety from experience; i.e.: don't try this at home.

So clearly at least the bottom and sides of the container have to be fairly strong to prevent this.  Soda cans don't qualify as strong any more.

[Blaster]

Soda cans don't qualify as strong any more.

At least soup cans are still pretty substantial when compared to the thin aluminum pop/beer cans.

[Cat Whisperer]

Having compared them, they are directly comparable to the 'tin' cans of yesteryear.  Meanwhile, back at the ranch ....