Im not well versed in the computer software dealing with internal ballistics.

Any chance you could give me a psi estimate of these loads?
Im planning on a 3-4gr charge of W231 with a 230 lead round nose (.452) in a converted Webley .455 Mark 6. OAL of 1.175in.
Also gonna try 4grs of Trail Boss

The bore itself might be tighter than .455.