Eli5 why has the chamber sealing design of the nagant revolver never been replicated in modern revolvers?

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As I have come to understand, the feature prevents loss of gas between the chamber and barrel, and also allows the nagant to be suppressed. These both seem to be good things in my opinion, hence the question.

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Anonymous 0 Comments

The things necessary for that feature are a bit more negative, than positives. For one, it required special ammo. The ammo was part of what closed the gap. So you’re in a scenario where off the shelf ammo just doesn’t work. Next thing is that the way that ammo works- when the hammer is pulled back, the cylinder and ammo are pushed forward to close the gap. So the hammer needs to have a longer firing pin in order to reach the primer. Which might result in the firing pin breaking over a lot of use.

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