I got into a bit of a pickle with trying to find the correct size ball/conical for my .44 Armi San Palo (Euroarms now) new model army.
Just noticed that the chambers are in fact countersunk for the 1st 1.5mm or so a larger diameter than the rest of the chamber. Was trying to achieve the shaved ring if lead on loading for a good seal and was going up and up in size to the point it was hard to seat the ball down onto the powder.

The gun was built 1979 and unfired and still in its box smothered in preservative when I got it.

Has anyone else noticed their cylinders have the above chamber features. Using a mates new model army I think its Uberti, it would appear that his cylinders are parallel and shave a ring off from the start although saying that my pistol centers the ball a treat before ramming.

Cheers all