Sounds like fun

For what it's worth, I've done tremendous time in training with the black guns for 'standing varmint' shooting and hotrod competition from the holster.

Dry practice is good for setting protocol into the grain of your brain.
You know, drills such as presentation from low ready (weapon in the hands, butt into the shoulder, muzzles low) up to target then choose to shoot or not...
On that administration of deadly force choice, my dry practice would include a protocol for safety off and trigger finger to the trigger pad (or not).
The way back off of target acquisition would include a return to safe on the weapon if there were one, my dry practice also includes quick checks to the right and left for the possibility of more incoming threat or target possibilities. Shooting something, especially something like what you're shooting, will render you with tunnel vision and a conscious training protocol of breaking that tunnel vision with quick checks to the left and right after a shot give you a better chance of seeing what's around you (the *other* tiger or lion for instance...)
A few repititions of this each morning or night at a good safe backstop (got anything safe at home for that chambering?) on snap caps (sounds like you have some fired brass for that project) should do the trick.
Just be conscious of what you have your hands doing for each piece of motion in your protocols and discipline that safety thumb into proper action without live ammo.
Don't mean to sound like a schoolmarm, but it might save your life some day.

Or just some more meat off that thumb...

--Tinker