Drum beat! lessons learned!

G.T. · 06-13-2020, 01:30 PM

Hi Karl, the problem breechblock, shows considerable wear at the bottom of the lip on the breechblock face? where it picks up the next round when loading. Nothing that would alarm one to a problem, just no sharp edges anymore? It was a used breechblock when I first installed it, and I don't know the amount of wear or damage that was present initially? And, I was blissfully unaware of any difference that mattered? But, the extraction and ejection was fair, or normal when I started the testing cycle, and degenerated from there. I must say though, I have never, to my recollection, had a Luger work like it does now? I'm not really sure what enabled the now powerful ejection cycle... The issue may be more prevalent in shooters that some one might have polished the breech face to facilitate loading or modified it to solve an unrelated issue? If I learn more, I will report, best to you, til...lat'r.....GT

I dug out the old B'Block and the edge inside the front breech face is still pretty sharp? It leads me to believe the "cure" part of the new B'Block might not be in the front part???... I will look deeper as time permits...

G.T. · 06-14-2020, 11:12 AM

Last night, I drug out the digital calipers and measured the old and worn, versus the new and un-used, and here is what I found. The front edge of the worn breechblock had worn away exactly .005" on the bottom front edge, just from rounds sliding up the breech block face from the magazine... So, if you are going to shoot your Luger, a lot, lot! (waaaay more than a little lot!) Sooner or later you're going to have to contend with the weak ejection as a result of this wear... Everything else measured exactly the same.. I'm not sure, but perhaps WW1 B'Blocks are not as hard as WW2 B'Blocks! I dunno? Best to all, til....lat'r.....GT

06-13-2020, 01:30 PM	#1
G.T. Lifer Lifetime Forum Patron Join Date: Jun 2002 Location: Chandler Arizona Posts: 3,530 Thanks: 1,334 Thanked 3,711 Times in 1,014 Posts	breechblock Hi Karl, the problem breechblock, shows considerable wear at the bottom of the lip on the breechblock face? where it picks up the next round when loading. Nothing that would alarm one to a problem, just no sharp edges anymore? It was a used breechblock when I first installed it, and I don't know the amount of wear or damage that was present initially? And, I was blissfully unaware of any difference that mattered? But, the extraction and ejection was fair, or normal when I started the testing cycle, and degenerated from there. I must say though, I have never, to my recollection, had a Luger work like it does now? I'm not really sure what enabled the now powerful ejection cycle... The issue may be more prevalent in shooters that some one might have polished the breech face to facilitate loading or modified it to solve an unrelated issue? If I learn more, I will report, best to you, til...lat'r.....GT I dug out the old B'Block and the edge inside the front breech face is still pretty sharp? It leads me to believe the "cure" part of the new B'Block might not be in the front part???... I will look deeper as time permits...

06-14-2020, 11:12 AM	#2
G.T. Lifer Lifetime Forum Patron Join Date: Jun 2002 Location: Chandler Arizona Posts: 3,530 Thanks: 1,334 Thanked 3,711 Times in 1,014 Posts	Measured and discovered! Last night, I drug out the digital calipers and measured the old and worn, versus the new and un-used, and here is what I found. The front edge of the worn breechblock had worn away exactly .005" on the bottom front edge, just from rounds sliding up the breech block face from the magazine... So, if you are going to shoot your Luger, a lot, lot! (waaaay more than a little lot!) Sooner or later you're going to have to contend with the weak ejection as a result of this wear... Everything else measured exactly the same.. I'm not sure, but perhaps WW1 B'Blocks are not as hard as WW2 B'Blocks! I dunno? Best to all, til....lat'r.....GT