Doug is on a trip but he'll get the message. lol I saw this fella on Youtube test shooting a little 1849 with some type of replica "bullets" rather than balls. His performance with modern clean and efficient BP was shocking. He averaged just under 900 fps for a 15 gr. charge! Actually beats the .32 ACP in energy and probably penetration. His test was water filled gallon milk jugs. The .31 penetrated 5 jugs, the exact same as a .36 revolver! The only difference was the .31 vs .36 holes! Even with pure lead the expansion was minimal, basically ending up an engraved wadcutter'ish looking cylinder.
I appreciate anyone doing their version of testing and can always learn from it. You just have to have an open mind and be positive.
Your gun has the Dragoon style trigger guard and curiously a "Remington" style front sight post. As you know most original Colts just had a brass pin. Back then no one really aimed a handgun but the crude sights were there for a base reference as to the direction of the projectile. Once Doug and I were fireforming an Encore with no sights at all. Sort of Brown Bess style. We were getting 3-4" groups at 33 yds. just looking down the barrel top.