Not all Colt percussion revolvers are LH twist. But, some are gain twist. Very odd to look down the barrel and see it nearly straight for a few inches and then take a sudden spiral near the muzzle. What's really odd is to find something like an 1860 Army that has had the barrel shortened- damn near no twist at all, making me wonder how inaccurate those things were!

Steve, can you post a picture straight on, from the side of your hammer (profile) when it is down, in the fired position, please.  The approximate serial number range of your gun also if you will.  If you prefer email, mine is in my profile.
Bob

Bob,
I only had one at my current disposal for pictures.  It's a Merrimack in a 44rf and the bore is much rougher than yours (LH also) but the hammer is a one piece.  Somewhere I have a B&W in similar configuration - it's pristine and I remember it having a blade in it that is pinned, I'll look for it later.
Greg

I've got a Kentucky Ballard with the 30" barrel and it has the left hand twist.

I pulled this rifle apart this week to clean it and make sure everything was good inside.  All the internal parts have the guns serial number including the hammer. The front of the hammer has been cut and fitted with an insert like some of the others shown here.  But, I think the hammer was partially replaced, either from a doner hammer or a new refit.   I appears the top was cut off and a replacement welded back on.  I ended up cleaning it up and reworking it so it looks somewhat better.

This first picture shows the nose insert and the start of the cleanup.

The next 2 photos are what appear to be welds.  Looks like they were carful to save the serial number by cutting the hammer off at an angle.

The last 2 are the hammer reworked and installed.  I intentionally kept the finish and checkering at a level that would not look new or incorrect and too perfect for the gun in its current state.

I still may need to replace the insert in the nose of the hammer once I try firing a round, but that will be fairly simple and not change anything I have already done.
Bob

Thanks Steve.  I’m going need some of your expertise getting this thing shooting.  Have brass, and the pistol blanks are on the way, along with a reamer.  But, need to know where I can find bullets?
Bob

Steve, Good info on the 44 and I’ve been through it.  But, mine is a 38, which I know you haven’t covered but was hoping you would know where to get bullets.
Bob