Kirst .45 for Uberti 1860 Army

[Jimeast]

I'm acquiring the parts to convert an 1860 Army (Uberti) to a .45 Colt cartridge.  Information on the Kirst website indicates the 1860 Army conversion cylinder is not quite long enough for a standard .45 colt bullet.  Are there any ramifications to consider in using a colt with the bullet (lead) pushed in a bit to end up with a total length that fits the cylinder?  

So far I've ordered a barrel and ejector assembly.  Ideally, in a few weeks I'll get the Kirst cylinder.

[Coffinmaker]

There are several "other" solutions to the problem.  To answer your original question, yes you can seat the bullet a mite deeper to clear the mouth of the cylinder.  I would suggest you investigate different bullets.  Something with a shorter reach from the crimp groove to the tip of the bullet.  My choice would be 160Gr or 180Gr RNFP Bullets.  OR:

Change cases.  Run it with 45 Schofield cases (Rim Clearance may be a problem).  Or, the simplest, Run it with Cowboy 45 Special cases.

Coffinmaker

PS:  Why did you order a barrel??  45 Colt will work just fine in the OEM Uberti .44 Barrel.  It's bore is actually 451.

[Jimeast]

I ordered another barrel, so I could have a 5-1/2 as well as the standard length.  I'll get it set to run both barrels.

Why did you order a barrel??  45 Colt will work just fine in the OEM Uberti .44 Barrel.  It's bore is actually 451.

[Johnson Barr]

The .452/160gr. RNFP bullets will give you the clearance needed with .45 Colt brass. The problem is that the heavier bullet will print 4-5" higher than with the same powder charge used with round balls out of the percussion cylinder. I use the Cowboy .45 Special brass with a 12gr. charge of 2Fg with 0.5cc dipper of Quaker grits as filler to take up the case space. This set up gives me 2" above point of aim accuracy at 10 yards.