Using 45colt cast ammo in a 410 has been done lots of times Its an oldtimers trick. Still a short range load say 25-30 yards max.
For resont date aplication look at TC Contender and the Judge hand gun both have 45colt/410 barrel or cylinder capibilities.
Very iffy to do it as the poster said could be dangerous with unknown pressures. We know what std. 45colt pressures are and what the n410 slug are too.