DWM Commerical breechblock question

saab-bob · 02-23-2015, 11:04 AM

Gents.
Thank you for the feedback.
The center of the breech block face is not flat. It is sunken down.Almost like someone machined a bevel,as its very even in shape. When I look inside the breech block it doesn't look pushed in. However its hard to make out small protrusions at the bottom of a dark tube!
On the primer flow,it looks like the primer is filling in the sunken part of the breech block face.AFAIK Fiocchi is a little hot,but the gun exhibits no excessive recoil.
I have all the dies and shells to reload 30 luger,but I have a bunch of Fiocchi ammo. I bought it ,when I thought production would be discontinued.
Hmmm.
Bob
Bob

sheepherder · 02-23-2015, 11:47 AM

Quote:

Originally Posted by saab-bob

When I look inside the breech block it doesn't look pushed in. However its hard to make out small protrusions at the bottom of a dark tube!

How about the firing pin??? From the print, it looks like the entire front slope of the firing pin would strike the inside of the breechblock. If that area is pushed in, it should leave a 'wear ring' on the firing pin. If it's worn or metal has been somehow removed, there shouldn't be any wear...I'm thinking...

The only thing similar to this that I've ever seen is chamber/bore erosion...

rhuff · 02-23-2015, 03:03 PM

As noted above, this is a most interesting condition. On examining the fired primers, it is obvious that there is a depression of the breechblock face in the area of the firing pin hole. It seems to be very uniform. It is as though someone used a tapered punch/drift and struck the area surrounding the firing pin hole., basically over correcting the problem.

I had a protrusion of material surrounding the firing pin, supposedly from dry firing, and corrected it with a flat faced brass drift and a hammer.......now the breechface is uniform. My spent primers look normal.

If you are overly concerned about it, and wish to continue shooting it, one could fit an aftermarket breechblock just for firing.

02-23-2015, 11:04 AM	#1
saab-bob User Join Date: Jul 2009 Location: So Cal Posts: 459 Thanks: 774 Thanked 143 Times in 87 Posts	Gents. Thank you for the feedback. The center of the breech block face is not flat. It is sunken down.Almost like someone machined a bevel,as its very even in shape. When I look inside the breech block it doesn't look pushed in. However its hard to make out small protrusions at the bottom of a dark tube! On the primer flow,it looks like the primer is filling in the sunken part of the breech block face.AFAIK Fiocchi is a little hot,but the gun exhibits no excessive recoil. I have all the dies and shells to reload 30 luger,but I have a bunch of Fiocchi ammo. I bought it ,when I thought production would be discontinued. Hmmm. Bob Bob __________________ "I think,therefore I own guns"

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02-23-2015, 03:03 PM	#3
rhuff Patron LugerForum Patron Join Date: Mar 2011 Location: Az. Posts: 2,309 Thanks: 2,738 Thanked 994 Times in 730 Posts	As noted above, this is a most interesting condition. On examining the fired primers, it is obvious that there is a depression of the breechblock face in the area of the firing pin hole. It seems to be very uniform. It is as though someone used a tapered punch/drift and struck the area surrounding the firing pin hole., basically over correcting the problem. I had a protrusion of material surrounding the firing pin, supposedly from dry firing, and corrected it with a flat faced brass drift and a hammer.......now the breechface is uniform. My spent primers look normal. If you are overly concerned about it, and wish to continue shooting it, one could fit an aftermarket breechblock just for firing.