Breech block extractor problem

DonVoigt · 08-30-2015, 10:30 AM

Rick,
Your analysis of the possible reason for the upset breech block in the OP's pistol is logical and may be the cause for the upset material, along with a "soft" block to start with.

As I have said about this one, several times, he needs a new breech block. This may correct his long head space too. If it does, everyone is happy.

The OP did NOT check his head space correctly as described, and his pistol is not currently out of
specification, it may in fact be several thousandts below max. He used a Brass gage(deformable) and used pressure to close the toggle!
See his post #9 for how he checked head space.

Unfortunately in mechanical devices, min/max specs can add up the wrong way and 0.020 or more gap space or what ever are frequently present.
Given the condition of the bolt, it is tough to accept that just a few rounds did this, maybe a few +P rounds or hundreds of normal rounds; or a breech block that for whatever reason finally failed?

No one is advocating firing the wrong ammo in a wrong chamber, the point of that post is that when it happened, nothing "bad" happened, except to the brass. The chamber Should have been marked when converted, but was not.

Heads space is not a "mere token", it has it's place, but it is way over-emphasized by many, including some who work on these things. Using SAAMI gages to pass or fail military chambers is easy to do, but not correct in many cases.

Vic, needs to check his new parts combination with a steel gage and no excess pressure to close the toggle
see what he has now.

JMHO.

08-30-2015, 10:30 AM	#33
DonVoigt User Join Date: Apr 2015 Location: near Charlotte NC Posts: 4,681 Thanks: 1,443 Thanked 4,355 Times in 2,041 Posts	Rick, Your analysis of the possible reason for the upset breech block in the OP's pistol is logical and may be the cause for the upset material, along with a "soft" block to start with. As I have said about this one, several times, he needs a new breech block. This may correct his long head space too. If it does, everyone is happy. The OP did NOT check his head space correctly as described, and his pistol is not currently out of specification, it may in fact be several thousandts below max. He used a Brass gage(deformable) and used pressure to close the toggle! See his post #9 for how he checked head space. Unfortunately in mechanical devices, min/max specs can add up the wrong way and 0.020 or more gap space or what ever are frequently present. Given the condition of the bolt, it is tough to accept that just a few rounds did this, maybe a few +P rounds or hundreds of normal rounds; or a breech block that for whatever reason finally failed? No one is advocating firing the wrong ammo in a wrong chamber, the point of that post is that when it happened, nothing "bad" happened, except to the brass. The chamber Should have been marked when converted, but was not. Heads space is not a "mere token", it has it's place, but it is way over-emphasized by many, including some who work on these things. Using SAAMI gages to pass or fail military chambers is easy to do, but not correct in many cases. Vic, needs to check his new parts combination with a steel gage and no excess pressure to close the toggle see what he has now. JMHO.