I had Barbie send me a .50 cal barrel with my Chambers/Mark Silver Virginia rifle kit. Yes, it's heavier than a .58 or a .62 cal., but I like it very much and shoot it well. It weighs 10 pounds even- unloaded, but with one of Rich's great flints. I call her - "Voluptuous Virginia" . "V V" for short.
That might be the way to go then, thanks
Coryjoe