I'll have to check my Uberti Remington chambers, but I haven't noticed the problem mainly because they've only been shot once as cap & ball, they now have Kirst 38 cylinders installed.
More to the point, I've never had good luck with .375 balls in a 36, they'll roll back out of some cylinders, or are pulled back out by the loading ram, which would indicate to me that my chambers are larger than the .373 mentioned. I have Uberti and Pietta Remingtons and Uberti Colts.
Speer 375's work better than Hornady, incidently, they are more round and consistant in diameter. I use .380 balls in all my 36's, and have no problems.