You clearly haven't shot much, even a 12 gauge slug doesn't break a 2 x 4 in half. Stone is way more rigid so instead of distributing the force of the bullet, as wood does, it takes all the force in a single space. I studied ballistics when I wanted to be a mercenary lolThe same can be said about shooting a 2x4 lol it won't crumble but it'll break in half.
It's mor then likely going to be fine with that size tank as long as nothing bumps it too hard. Not talking down on ya f1, simply arguing my point. It is a good, thrifty idea for a smaller tank. You could even just get thin sheet of wood to cover it to add a bit of peace of.mind
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