Couple problems happening here - Page 2

Rick W. · 11-03-2012, 07:25 AM

If you are talking about index marks, barrel/receiver; then you might ask am I a looker or a shooter?

If a shooter, does it shoot to the point of aim?

If a looker, then the marks being off may have some effect on perseived value. Some folks believe that the marks being off, means the barrel has been off since the factory days, others are not so sure.

The marks can be aligned with special tooling, ie the barrel vise and receiver wrench(very important).

Sky Zero · 11-16-2012, 08:04 AM

Quote:

Originally Posted by Rick W.

If you are talking about index marks, barrel/receiver; then you might ask am I a looker or a shooter?

If a shooter, does it shoot to the point of aim?

If a looker, then the marks being off may have some effect on perseived value. Some folks believe that the marks being off, means the barrel has been off since the factory days, others are not so sure.

The marks can be aligned with special tooling, ie the barrel vise and receiver wrench(very important).

Well would that effect the function of my gun at all? I shoot her but I'm having this problem and I was curious if it's due to the misaligned barrel

Rick W. · 11-16-2012, 08:50 AM

Index marks(witness marks etc) are used to remove and reinstall barrels onto receivers and retain the original headspace characteristics and sight alignments. This of course, is true blue, if the parts are originally fitted to one another; otherwise you takes your chances.

With all the parts changing going on now and previously, the alignment marks may or may not indicate originality. If the marks are true, then the sights should be in alignment for shooting with a particular type of ammo. If one cranks the barrel past or before the true index mark, then the point of impact will change, just like changing ammo types.

So if the index marks are off from one another on your particular Luger, what does that mean.......I really cannot tell from here. If one pays attention to the various clearances in the breeching system, particularly around the extractor to its receiver cavity, then one might gain some insight about functionality. There are cuts in the barrel and in the receiver for receiving the extractor nose. If the extractor is off axially of its cavity(s) and scrapeing, then probably will not function as well or perhaps be long for the world.

Likewise, the tension on the extractor has to be turned for the system, such that the spring provides the movement of the nose over the case's rim. If the extractor provides the movement itself due to trash or a overly long extractor spring(excessive stackup), the extractor will eventually break in half.

Index marks are supposed to be a indication of original fitment of barrel to mechanism. As before, today's parts changing makes taking a fine look at the fit of parts rather than the index mark for shooting purposes. Index marks have the only influence on perseived value for collectors, guess they assume originality from such a visual.

of course, you all ready knew all these things...............some my remarks of course, is opinion.

jonnyc · 11-16-2012, 09:11 AM

My matching (all except the side-plate) RC Luger does exactly the same thing to brass. Since mine shoots and functions 100%, I just ignore it. I don't reload 9mm, or save the brass, so I am happily assuming it is a non-issue.

11-03-2012, 07:25 AM	#21
Rick W. User Join Date: Jun 2002 Posts: 339 Thanks: 81 Thanked 359 Times in 198 Posts	If you are talking about index marks, barrel/receiver; then you might ask am I a looker or a shooter? If a shooter, does it shoot to the point of aim? If a looker, then the marks being off may have some effect on perseived value. Some folks believe that the marks being off, means the barrel has been off since the factory days, others are not so sure. The marks can be aligned with special tooling, ie the barrel vise and receiver wrench(very important).

11-16-2012, 08:50 AM	#23
Rick W. User Join Date: Jun 2002 Posts: 339 Thanks: 81 Thanked 359 Times in 198 Posts	Index marks(witness marks etc) are used to remove and reinstall barrels onto receivers and retain the original headspace characteristics and sight alignments. This of course, is true blue, if the parts are originally fitted to one another; otherwise you takes your chances. With all the parts changing going on now and previously, the alignment marks may or may not indicate originality. If the marks are true, then the sights should be in alignment for shooting with a particular type of ammo. If one cranks the barrel past or before the true index mark, then the point of impact will change, just like changing ammo types. So if the index marks are off from one another on your particular Luger, what does that mean.......I really cannot tell from here. If one pays attention to the various clearances in the breeching system, particularly around the extractor to its receiver cavity, then one might gain some insight about functionality. There are cuts in the barrel and in the receiver for receiving the extractor nose. If the extractor is off axially of its cavity(s) and scrapeing, then probably will not function as well or perhaps be long for the world. Likewise, the tension on the extractor has to be turned for the system, such that the spring provides the movement of the nose over the case's rim. If the extractor provides the movement itself due to trash or a overly long extractor spring(excessive stackup), the extractor will eventually break in half. Index marks are supposed to be a indication of original fitment of barrel to mechanism. As before, today's parts changing makes taking a fine look at the fit of parts rather than the index mark for shooting purposes. Index marks have the only influence on perseived value for collectors, guess they assume originality from such a visual. of course, you all ready knew all these things...............some my remarks of course, is opinion.

11-16-2012, 09:11 AM	#24
jonnyc User Join Date: Dec 2008 Posts: 425 Thanks: 2 Thanked 46 Times in 34 Posts	My matching (all except the side-plate) RC Luger does exactly the same thing to brass. Since mine shoots and functions 100%, I just ignore it. I don't reload 9mm, or save the brass, so I am happily assuming it is a non-issue.