I'm a very poor pistol shot.im pretty happy with this offhand 20 yards group with .457 RB and 40g of blk MZ.shoots right to the fixed sights.after this group I managed to skip a can all over the place.
The ROA is an accurate handgun. I started out with RB but Arkansas doesn't allow their use for deer hunting, only conicals. Switched to the Lee 220 conical............had to change out the front sight. Quick call to Ruger and a BH 45 LC front sight was in the mail. Mine likes Pyrodex "P" for a black powder substitute.
What's the throat on that ROA ? I have a relieved 430421 2C that drops .448+ , ideal for pp .451-2 . It is also is a resistance slip fit in a Dragoon . 35-40 gr of FFg should be pretty safe in that as well as 45ish of the home screen BP . I remember the ROA needing .458 RB vs .451-4 in the various Rem/Colts copies . You might get away with a 45-200 or the like in it .
I've tried 2-3 times to get a RB mould cut out to a flat base . EG a .454 RB with a .449 base and a fat lube groove . Dead soft it should be a firm slip fit on the base in most copies and positive seal on the ball . It would be heavier but no take up significantly more chamber space . The difference in 141 gr and 170+- and meeting the conical requirement might be just the ticket . Of course it might tumble and not shoot fer beans too due to insufficient length .
I shot that Lee conical mold in my old Ruger old army and it shot really well. I have the Lyman 457127. It's a gallery bullet for the 4570 . I'm thinking giving that ago. It cast too small for my trapdoor at .457. So at least maybe I'll have a use for it
I also shoot the RB's and the Lee conical in my ROA. I also picked up a mould from the Lee website in the clearance section that I think was a rejected Kaido mould because it casts a 250 WFN type bullet a@ .457" so I figured I would try it out. So far it is shooting good.
I sure am glad I bought another old army. I'm not going to let this one leave my hands like the three other as I've owned. I wish I could find the old Felts hats I had stashed away to make my own wads. I bought some at the store and they are thin and I don't like them quite as well as the ones I was making myself