Thread: 45 colt and 410 shotguns

What's the go with making a 410 run 45 colt?
There seems to be guns that run both but they must have 11.4mm bores to run a 45 cal projectile?

Can you then treat them like a low power rifle running trail boss and cast lead 45 cal projectiles?

I have a robust little 410 single shot that would be great to sling a 500gr cast projectiles I have a mould for