Has anyone here ever fired .327 mag through a M47 Medusa?

No, the Medusa is a 9mm/357 caliber revolver (.355 - .357 groove diameter) The 327 Magnum is a 32 caliber cartridge (.312 inch in diameter bullets) and the bullet will not fill the bore. It would not function well at all as there would be no gas seal resulting is very poor velocity and very poor accuracy. Case would no doubt be damaged beyond re-use. In general a very bad idea. Us the cartridge the revolver is design for. In this case that is a fairly long list why try to use others?

Beat me to it. Here's a write up: https://en.wikipedia.org/wiki/Medusa_Model_47

It makes little sense that a 32 diameter bullet would maintain any accuracy through a 357 ish barrel. Got a reference for that?

I don’t know the answer to your question, but I’m absolutely certain you’re one lucky individual to have got your hands on that gun. Enjoy it twice for someone who is unlikely to ever get their own!

You can shoot it, but it would be a waste given there's no accuracy and also because .327 is so high pressure it could be dangerous. Actually, it could damage the gun because I have no doubts the case will basically explode.

Cascadian...tell us how you came about this pretty rare piece.

The medusa was featured on forgotten weapons ...
This gun isnt about accuracy ... this gun is about "shoot what you got"

walterelm said:

The medusa was featured on forgotten weapons ...
This gun isnt about accuracy ... this gun is about "shoot what you got"

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Yeah but a 32 caliber bullet in a 36 caliber bore is just bad even if the SHTF. The Madusa can shoot a bunch of ammo safely and reasonable accurately. No need to go outside what it is design for short of a really really bad SHTF situation.

mcb said:

Yeah but a 32 caliber bullet in a 36 caliber bore is just bad even if the SHTF. The Madusa can shoot a bunch of ammo safely and reasonable accurately. No need to go outside what it is design for short of a really really bad SHTF situation.

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^^^This.

I have never fired .327 Magnum through an M47 Medusa and would not on a dare (and I have taken risky dares in the past).

".32" revolvers fire cartridges with .311 to .312 inch diameter bullets (about 7.92 mm diameter). The .327 is a .32 magnum and uses the ".327" monicker to emphasize that it is a magnun version of a .32 revolver cartridge, like the .357 Magnum is a magnum version of the .38 Special.

The M47 Medusa is designed to fire a slew of different cartridges (.38 Special, .357. .380 ACP, 9mm s etc) mostly cartridges with straight wall or slightly tapered cases which fire bullets of .355 to .358 inch diameter (about 9 mm diameter).

.327 Magnum cartridge is too small in diameter for use in revolvers chambered for .357 magnum. I would fear that a .327 Magnum cartridge case would swell and split, leaking gas out the rear of the cylinder.

Notice that he say "we don't know where the bullet is going to go." in reference to the 7.62 Tokarev. I would argue the same for that 32 ACP that fell through the cylinder right after he says that.

Another thing to consider that of the cartridge the Medusa is actually design for the highest pressure is from a 9mm +P at 37,500 psi. The 327 Fed Mag (assuming we had a standard gas seal) could potentially produce 45,000 psi.

Its a cool idea in concept but in practice its seem sort of sketchy. Especially when he uses sub-caliber cartridges, what a mess when the brass came out of the chambers.

This is an honest question. How much pressure would the .327 Mag actually make? The bullet won't be able to keep the gasses from escaping around it, would it be able to make much pressure?

Cascadien said:

rest assured i will NOT BE TRYING THIS

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Thank you. Even though it’s your gun and you can do as you wish it would just be shame to hear that you saved and waited so long only to destroy your Grail Gun.

When I read about these guns years ago I wanted one. Then they disappeared and I forgot about them until I read your post. Such a cool firearm.

Pudge said:

This is an honest question. How much pressure would the .327 Mag actually make? The bullet won't be able to keep the gasses from escaping around it, would it be able to make much pressure?

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In reality it would be relatively low. I would be interesting to measure the velocity from any of the sub caliber rounds Ian in the above video fired from a Medusa. I bet you would be lucky to get 500 fps from any of them including 327 Fed Mag if someone tried it.

Neat revolver. I would stick to the .35 or so diameter cartridges myself.