klw, I can't find picture of an original and replica Schofield, but the attached photo should show you difference. The photo's are of Guano's guns. The nickel plated Schofield is a modern reproduction, the bottom revolver is an original of the black powder frame era.
Notice how the front of the cylinder meets the barrel and the cylinder fill in the area right up next to the front of the frame on the replica? Now look at the original revolver. The cylinder meets the rear of the barrel but there is an offset area allowing an opening between the front of the cylinder and the frame. This is where the problem arises when shooting blackpowder. There is no place for the gases to escape, subsequently they are forced downward ( actually in all directions) thus causing an extreme buildup of fouling. On the original revolver there is an additional item called a gas ring (which does not show up in the photo), it protects fouling from entering into the area of the cylinder pin, and keeps it operational and help diminish fouling.
http://i27.photobucket.com/albums/c156/iamguano/Schofield/MyCimarronn.jpg
That was an excellent explaination. Thanks!
But it raises a question. Neither the S&W Schofield nor the new Beretta Laramie are what I'd call economy models. I don't think that a low price was the driving force behind either gun. So if this cylinder difference and the gas ring worked well in the originals, why weren't they put into these reproductions? After all some number of these guns were most likely going to be shot with blackpowder.
I can not really envision the gas ring but would there be any practical way to add this to a Laramie?
Also if you had an original with these two features, how many rounds could you shoot before blackpowder fouling became a problem?
Finally, am I correct in assuming that you can cast your bullets for these out of pure lead?