Someone out there with the right tools needs to test this theory of the 410 and post the results here.
WITH A DISCLAIMER
How big is the chamber on a standard Pardner 410?
How big is the bore of a standard Pardner 410?
Is the barrel tapered on the inside, down to the choke?
Is the choked muzzle 410 or smaller?
These are all questions, IMHO, that need to be answered before you would even attempt to fire a 45lc out of a Pardner 410.
Just my 2cents
cookiemann