What guns are we talking about?
The Uberti 1851 Colt Navy with the Howell .38LC Cylinder compared to the Cimarron 1851 Colt Navy "Man with no name" conversion.
What guns are we talking about?
Both would be fine shooting spl in.
Sounds like the 1877 Lightening/Thunderer model. Those have THIN cylinder walls.
What about blackpowder in .38spl? My Lyman BP manual lists .38spl from 7,500CUP up to 11,600CUP depending on bullets and powders used. The highest pressure load is 17.5gr Goex FFFg under a 158gr bullet yielding 11,600 CUP.
The Thunderer is .41 LC.
Ps. Where did you get the 5,000 number? Max pressure is 12,000? Seems mighty low for a 700fps cartridge.




























