So cool!

No problem believing it's an 11-bore, what are the chamber measurements?
10-bore brass with 11-bore projectile..?

My WR has a cat on the trigger guard too.
I doubt they were thinking shot/ball, the all-folding sights likely were to facilitate 'point-blank' shooting.

Shoot it!
Can't wait to hear how it goes.

Cheers
Tinker