Hi Jack
I'm in the probably unique position of owning both the muzzle loading and long barrel variant of the Alfa.
The muzzle loader is the standard 6" barrel version though mine came from Alan Westlake originally.
The long barrel version is the same as shown on Valmont's website at the bottom, bought second hand. It's surprisingly light for an LBR, weighs less than the equivalent Taurus. But only holds 6 rounds, the Taurus holds 7.
No you can't change the cylinder from the long barrel version onto the muzzle loading version. Someone was bound to ask ...
Internally both Alfa's are identical. Slightly fiddly to strip but easy enough once you've done it a couple of times. Doesn't need cleaning internally very often, I do mine once a year as routine maintenance. I don't get any lead build up on the forcing cone on either model.
Accuracy
Bearing in mind the LBR has a longer barrel, it will give a higher velocity and should be slightly more accurate. However, in practice there's nowt to choose between them, the shooter is the limiting factor I find. Especially in my case ;-)
Both pistols will put a 2" group at 20 yards from a rest, using iron sights. Or better. Damn my eyes.
Single action is very good on both, nice and light. Double action takes a bit of a pull but smooth enough. I don't feel the need to improve the trigger on either of them.
My loading for the long barrel version ;
105gr SWC bullet, alox lubed
3.2 to 3.6gr of Bullseye or similar fast pistol powder (both work for accuracy on the lbr, sometimes I just want a slightly bigger bang)
My loading for the muzzle loader ;
105gr SWC bullet, alox lubed
3gr of Blue Dot or Herco shotgun powder
I cast my own bullets and the Lee mould number is 90316.
Note I use the same bullet, it proved more accurate for target work at 25 yards than any other bullet I tested.
If it helps you I have a video which shows how to strip down the Alfa for cleaning :
https://www.youtube.com/watch?v=Vge4J7nbthk
If you search for "Alfa muzzle loader" on Youtube there are a good handful of videos as well.
Buy one, they're fun! That new short barrel version looks ace.
Regards
Paul M.