Howdy
Trail Boss is not a Black Powder substitute, although many think it is. It is a modern Smokeless powder with a sharp pressure spike. Pyrodex is a true Black Powder substitute, but it requires a soft Black Powder compatible bullet lube, which you will not find on modern commercial bullets. If you don't want to use real Black Powder, which also requires a soft BP compatible bullet lube, I suggest American Pioneer Powder (APP). This can be loaded with regular hard cast bullets.
Do not make the mistake of putting in just a little bit of Black Powder or any substitute and leaving air space in the cartridge. Don't do that, these powders need the case to be filled with powder without any air space.
If you don't want to spend the money on a Smith and Wesson, and yes they are and were the best, I recommend an Iver Johnson.
I picked up this Iver Johnson Safety Hammerless for about $100, but that was quite a while ago.
Note: Iver Johnson completely redesigned their revolvers for Smokeless powder sometime around 1900. This is one of those. Notice the little owl on the grip is facing backwards, if you take the grips off, the hammer spring is a coil spring, and if you look at the cylinder lockup you will see the bolt engages the slots on the cylinder on both edges.
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This is an older Iver Johnson from the Black Powder era. Note the little owl is facing forward. If you remove the grips, the hammer spring will be a leaf spring. And notice that the bolt will not engage the cylinder slots on both edges, only one. The hand keeps the cylinder from rotating backwards. I do not recommend buying one of these, no matter how cheap.
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