Mass produced revolver question

[zipty6]

My limited familiarity is with S&W revolvers.

The angles on the outer edges of the ratchet teeth are key to getting the timing right. They have to be cut correctly for each tooth. It is time consuming and can be nerve-wracking the first couple of times. That being said, it is not beyond the ability of the somewhat mechanically inclined.

 

[264killer]

With the hammer cocked when I pull the trigger there is no movement of the cylinder. Taurus 357

 

[Tailgate]

Don't forget that the 9mm is actually .354-.355 vs .357. A few things to think about...one, it is going to be traveling down the cylinder loosely a bit before it hits the forcing cone...so be aware that even if perfect cylinder alignment, that bullet isn't properly stabilized before it hits the forcing cone. Also, .002-.003" doesn't sound like a lot, but it WILL affect the accuracy as it is not nearly as tight a fit in the barrel/rifling. Will be like shooting out of a "worn out" barrel. And as mentioned by another poster, if the cylinder timing is not exact....hitting that forcing cone not perfectly will ALSO cause deforming of your bullet before it bounces around the looser barrel...again, affecting accuracy.

Instead of buying the cylinder, maybe spend the money on buying a cheap reloading press if you don't have one, like a Lee Loader. Start reloading .38s and .357s and save money in the process on ammo. Will still be cheaper than 9mm boxes at today's prices.