Gunsmithing Chambering (first time)

coleray505

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Minuteman
Aug 21, 2010
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I'm getting ready to chamber and install my first barrel. I have the skills and equipment to do this, but I do have a question. Should I run the reamer in a floating holder, or indicate it coaxial with the bore and run it in a said setup? I'll be running it on a small cnc lathe.
 
Re: Chambering (first time)

I have the Manson holder, and while I have only used it on 2 dies so far, I like it a lot, keeps the hands free.

I think the most critical part from my comprehension is making sure the barrel is dialed properly. This means where the bullet will first engrave the lands, it will be perfectly concentric to the chamber. I have seen 2 ways to do this, the first is to make sure there is zero run out in the first 2-3" of the bore, and the other was to make sure the barrel is running concentric just at the spot where the throat will end up...
 
Re: Chambering (first time)

having used it on a few chambers now, i am a big fan of the jgs holder.

question for the op, are you going to push the reamer with the carriage at a programed feed rate or are you going to use the tailstock manually?
 
Re: Chambering (first time)

Said was supposed to be solid.

I would much prefer to run it off the toolpost. That way I can program the feedrate and depth. I have a tailstock, but it is a manual op.
 
Re: Chambering (first time)

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: AZPrecision</div><div class="ubbcode-body">William, can you reccomend one? A good one. </div></div>

I made mine. It's a floating pusher
 
Re: Chambering (first time)

We use the Erickson/Kennemetal type. They are made for standard chucking reamers. Build a holder and drive it with the carriage. If you have a readout, it is MUCH easier to get it right. I also really like the muzzle flush. If you dont have it, run the last .100 or so .010 at at time to make sure the throat area doesnt gall up with a chip. We use the floater holder and indicate the barrel in at the throat area both to insure a good runout. Good luck and have fun.
 
Re: Chambering (first time)

I use the Bald Eagle, floating pusher holder, works very well.

However, I do pre-bore all my chambers.


Never had an issue with the BE, but it becomes a mite snatchy on larger chambers - you need to get the "feel" of the cut just so..
 
Re: Chambering (first time)

Jerry,
I had been looking at the kennametal type. Would you recommend the double pin or full floating type? Somma tool makes one of each that are very similar to the KM, have you heard anything about them?