This is starting to not make sense.

A 5 lb co2 bottle has an average charge of 1200 psi.
With a floodable volume of probably around 20 cubic feet.

An 80 cubic foot scuba bottle had an average charge of 3000 psi.
A scuba bottle has four times as much gas.

It would seem logical that the scuba bottle could fill four times as many tires. Either bottle gets a pressure reduction to around 100 psi which turns it into shop air.

Of course the higher the pressure increases the inherent risk but, pressure is pressure it doesn't matter if it's a gas or a liquid it has the same energy.

OK sea story,
We had a kid drop a full scuba bottle off the back of a pick up on the highway, that thing bounced like crazy(we were right behind them peeing our pants) that ended it's service life but it didn't rupture.