Breech block extractor problem

[DonVoigt]

It would be a major operation to mill/bore a hole offset to the front, in an existing block; and that would not solve the existing problem of the damaged area.

You need a new block and may have to select fit from more than one to reduce your headspace- though I do NOT think headspace is causing this problem.

If you felt any resistance on the closure on your guage, the head space was shorter than the guage. The brass is likely now deformed, guages are made from steel for just this reason.
Closing the toggle with any force negates the use of the guage, as the toggle gives additional leverage.

My no go guage is 0.757 and the go gage is 0.751 (just measured them), so there is something amiss in the land of guages and measurements it seems.

Where does your data on headspace come from?

What I see is more in like with the brass measurement mentioned of 0.745.

Cartridges of the World gives a case length of 0.754.

I did find this SAAMI spec page, which gives the head space from
.754 min to .776 max. As we know, military specs will be different, usually larger.

Originally Posted by Vic103

I wonder if it's possible to sleeve toggle hole which pins to receiver. If I moved it about .015 that would give me a headspace of .761

Min is .754
Max is .776
The mean would be .765