I just bought a new Uberti 1851 Navy with 5 inch barrel. I took it to the range today. I was also trying some Traditions .375 diameter balls for the first time.
On two of the chambers there was little or no lead shaved and when I retracted the ram the ball came out easily and was stuck to the ram ( see pic)
Really appears that inside the chamber is larger than the mouth. While I don't think this is possible it sure felt that way. Slight resistance inserting the ball then no resistance until it seated on the powder.
I'm sure these balls run a bit undersize since I tried them in my Pietta 51 and got much less lead shaved than with the Hornady and Speer .375's I've used before.
Anyone know where I can get .377 or .378 balls?