Ho Paladin,
That's way too small for the DD/ROA. Never swage down to .445. I'd have to have a special mold design for just that caliber. So, for the time being, it's round balls for these guns.
The original reason I designed the DD/ROA for the Ruger Old Army was because I knew that Ruger held their tolerances very tight. So far, this has proven to be the case. Ruger calls the ROA a 44, but it's really a 45. I was thinkin' that the other "44s" were like the ROA and the bullet might be made to fit. This seems not to be the case.
Sorry about that,
DD-DLoS