[pax]

Dakota,

I would accept that as a safe backstop. It is a little safer if you choose the base of the corner where wall and floor come together, and safer still if you reinforce it in some way (Such as by putting something solid in front of it).

Theo,

I would also accept a big stack of books as a safe backstop. From your earlier description, it sounded as if you were just using an ordinary interior wall, without somehow reinforcing it.

These days, there's almost no reason to dry fire a functional gun anyway. For less than a $20 bill, you can pick up a Barrel Blocker from Train.safe.us or a Training Barrel from Blade Tech. Either of those products will disable your firearm, rendering it safe for dry fire.

Pax