Checking velocity and or penetration of that loading is a good idea to understand the capability and limitations of the gun. A .36 is a tricky gun to understand ballistically based on source documents alone or even advice of some who shoot them. Testing in 1850 showed 20 grains of powder and roundball was sufficient to punch through 6 boards of 1 inch pine separated by an inch. I would challenge anyone to match that performance with modern replicas and that loading of powder. For a modern .36 cap and ball with modern powder to be MINIMALLY adequate by modern standards, it must be FULLY loaded with QUALITY powder. The widespread failure of blackpowder shooters to understand that fact is why the elegantly proportioned Navy is often bored to .44 as an ahistorical work around. Restoring these civilian arms to their original military performance requires one to be very picky and very selective about the gun chosen and the powder loaded. Also, when talking about the .36, it should be noted that the Uberti is often chambered and barreled to exactly .375 while Piettas are chambered and barreled closer to .373 or as small as .369! When we’re talking about an arm requiring maximal loadings to attain merely adequate performance, a difference of a couple grains of lead and .004 inches of projectile diameter may or may not significantly affect ballistic performance, but I’d check to see if that difference makes a difference and opt for more lead with greater surface area given the choice.