Any thoughts on the cause of excessive pressure in this .327 Federal Magnum?

Carmady · June 17, 2020, 03:47 PM

Flat primers and stuck casings.

https://www.youtube.com/watch?v=Ra7EpzYArbo

**Aguila Blanca** · June 17, 2020, 07:52 PM

How can the same ammunition, from the same box, be over pressure (creating flattened primers and stuck cases) in a revolver and not be over pressure in a rifle?

Logical fail. I stopped watching at 5:05. Couldn't take any more.

74A95 · June 17, 2020, 08:20 PM

Quote:

Originally Posted by Aguila Blanca

How can the same ammunition, from the same box, be over pressure (creating flattened primers and stuck cases) in a revolver and not be over pressure in a rifle?

Logical fail. I stopped watching at 5:05. Couldn't take any more.

You don't seem to understand very much about guns.

Carmady · June 17, 2020, 08:25 PM

What do you mean by "logical fail?"

That the logical conclusion is the revolver is out of spec in some way/s that would increase the pressure?

stinkeypete · June 17, 2020, 09:27 PM

Waste of a video.
Contact Ruger Customer Service, explain issues. They will make it right.

Flattened primers is not an indication of pressure other than .327 is a high pressure cartridge. This is various boxes of factory ammunition. It’s not the ammo and what it’s shot in doesn’t change the pressure unless the bullet is touching the forcing cone or more.

Difficult extraction might be overpressure. It might be chambers out of spec too large, too small, chambers rough, or bad brass.

Shooting low...file some metal off the front sight, slow and careful... Or send it to Ruger!

Send it.

**Aguila Blanca** · June 17, 2020, 10:46 PM

Quote:

Originally Posted by 74A95

You don't seem to understand very much about guns.

No, I guess not.

Carmady · June 18, 2020, 03:08 AM

Here's another video by another person with the same brand of revolver with similar accuracy (shooting low) issues, plus keyholing. No mention of flattened primers or stuck casings. Disregard the "38 S&W Long" part.

https://www.youtube.com/watch?v=yvmITZqi0kM

mehavey · June 18, 2020, 05:18 AM

OOC: What are the cylinder throat diameters compared with both bullet and groove diameters?

jus' askin' . ...

June 17, 2020, 03:47 PM	#1
Carmady Senior Member Join Date: February 26, 2013 Location: on the lam Posts: 1,735	Any thoughts on the cause of excessive pressure in this .327 Federal Magnum? Flat primers and stuck casings. https://www.youtube.com/watch?v=Ra7EpzYArbo

June 17, 2020, 07:52 PM	#2
Aguila Blanca Staff Join Date: September 25, 2008 Location: CONUS Posts: 18,468	How can the same ammunition, from the same box, be over pressure (creating flattened primers and stuck cases) in a revolver and not be over pressure in a rifle? Logical fail. I stopped watching at 5:05. Couldn't take any more. __________________ NRA Life Member / Certified Instructor NRA Chief RSO / CMP RSO 1911 Certified Armorer Jeepaholic

June 17, 2020, 09:27 PM	#5
stinkeypete Senior Member Join Date: July 22, 2010 Location: Madison, Wisconsin Posts: 1,293	Waste of a video. Contact Ruger Customer Service, explain issues. They will make it right. Flattened primers is not an indication of pressure other than .327 is a high pressure cartridge. This is various boxes of factory ammunition. It’s not the ammo and what it’s shot in doesn’t change the pressure unless the bullet is touching the forcing cone or more. Difficult extraction might be overpressure. It might be chambers out of spec too large, too small, chambers rough, or bad brass. Shooting low...file some metal off the front sight, slow and careful... Or send it to Ruger! Send it. Last edited by stinkeypete; June 17, 2020 at 09:34 PM.

June 17, 2020, 08:25 PM	#4
Carmady Senior Member Join Date: February 26, 2013 Location: on the lam Posts: 1,735	What do you mean by "logical fail?" That the logical conclusion is the revolver is out of spec in some way/s that would increase the pressure?

June 18, 2020, 03:08 AM	#7
Carmady Senior Member Join Date: February 26, 2013 Location: on the lam Posts: 1,735	Here's another video by another person with the same brand of revolver with similar accuracy (shooting low) issues, plus keyholing. No mention of flattened primers or stuck casings. Disregard the "38 S&W Long" part. https://www.youtube.com/watch?v=yvmITZqi0kM

June 18, 2020, 05:18 AM	#8
mehavey Senior Member Join Date: June 17, 2010 Location: Virginia Posts: 6,896	OOC: What are the cylinder throat diameters compared with both bullet and groove diameters? jus' askin' . ...