Barrel indexing; is it worth it?

[Don]

Ok, since we're sharing crazy ideas.... I'll share one of mine.

Bear with me

Once we've accepted the idea of ANOTHER JOINT of some sort, or another method of fixation....... Howsabout replacing barrels at the neck instead of reaming an entire chamber? KEEP that perfect chamber and just pop on a fresh barrel with a new neck and throat. IF the concept could be proven to work then actions could be made which accept a sleeved chamber, or for that matter an action could be made with the chamber reamed right into the receiver ring which brings us back to one joint.

I'd love to be able to inspect my throat/leade by just looking at it.

I've thought about the sealing issue, I believe that it can be resolved. One of my resolutions includes differential threads like a K&M neckturner which produces incredibly high tension at a vertical joint (and could include indexing now that Gene's brought it to our attention)......... In fact, this is why I bought my lathe. Not for the indexing, I hadn't thought of that, but for exploring the different method of barrel attachment. Unfortunately it's gonna' take 50-100hrs of my limited time just to get the lathe run in, right now it ain't gonna happen for a while.

Hey, I'm just throwing the idea out before the crowd since the crowd IS gathered around nicely....

flame away


al

Off the cuff......... since a multi-part chamber would not appear to save; time, cost, or improve accuracy, I am not sure there will be much of a reason to pursue the idea.

Takes less time and better alignment results in cutting a complete chamber with a single reamer that has all the chamber features ground to final dimensions.

Possible solution looking for a problem, as far as my limited imagination can forsee...................Don

 

[JerrySharrett]

Once we've accepted the idea of ANOTHER JOINT of some sort, or another method of fixation....... Howsabout replacing barrels at the neck instead of reaming an entire chamber? KEEP that perfect chamber and just pop on a fresh barrel with a new neck and throat. IF the concept could be proven to work then actions could be made which accept a sleeved chamber, or for that matter an action could be made with the chamber reamed right into the receiver ring which brings us back to one joint.


al

Nothing to flame but anyone who is not cutting a perfect chamber every time is not using the proper machining procedures.

Preparations in the barrel to cut an opening to align and secure a "portable" chamber would cause more problems than the chamber itself.

I am still making the argument that if a barrel is properly chambered and crowned, indexing is not necessary either. However, there may be some barrels out there that indexing would improve, but had they been properly fitted indexing would not have been needed in the first place.

Why dig a hole to put the dirt in that came from the last hole???

 

[eww1350]

Just a little off subject

Since the discussion has wandered towards a barrel chamber to bore alignment..
Does the factory hammer forged barrels get the chamber during the hammer forging process or after the barrel is forged on the bore mandrel..???

If you have a link to a website that describes or shows the process, I would appreciate it...

 

[HovisKM]

Since the discussion has wandered towards a barrel chamber to bore alignment..
Does the factory hammer forged barrels get the chamber during the hammer forging process or after the barrel is forged on the bore mandrel..???

If you have a link to a website that describes or shows the process, I would appreciate it...

It's done both ways, depends on manufacture. Seen a TV show many years back that showed it being done both ways in the same factory. Don't remember which but what I do remember is seeing one mandral with the chamber with it that was so crooked, you could see it. It had a bend about three inches in front of the chamber.

Hovis

 

[alinwa]

Al
The Germans have already done it on there 50 caliber tank gun called a 1918 Mauser.Randy Dierks in Sparks,Nevada has done the barrel work on it for many years now.
Lynn

I didn't know that.

Thanks for all the replies.

al