[Noz]

Chamber chamfering is not a necessity but a convenience. It makes the pistol easier to load since the ball is already "down in the chamber" a bit.

As with most black powder guns, it ain't rocket science and does not need to be treated as such.

A couple of turns of a LEE case chamfering tool in each chamber will break the sharp edge of the chamber mouth and allow a nice easy loading.

Is it exact? NO!

Does it need to be exact? No!

Does it work? Yes!

All of my competition guns are thusly treated.

Let me lay something else on you.

When I first started SASS competition with C & B pistol I shot Remingtons. Because the Italian guns have short triggers ie do not fill the trigger guard from top to bottom, I frequently pinched my trigger finger between the toe of the trigger and the trigger guard. I occasionally came up with some impressive blood blisters. I switched to the 1860 Armys and had the same results.

What if the trigger were just a tiny bit longer?

I bought a spare trigger, put the curved portion into my vise and squeezed, listening for the dreaded ping of the metal breaking followed by the clink of it hitting the floor. To my surprise, the only thing hard about the triggers is above the screw hole. Below the screw hole is soft steel that bends easily. Squeezing the bend makes the bend shallower and in effect makes the trigger longer.
Bend them until the toe just clears the trigger guard. If the toe hits the trigger guard, then put a little curve back into the trigger. This also tends to move the trigger back in the trigger guard which is again a good thing.

No more pinched fingers.

Again, ain't rocket surgery!