PTG reamer problem?

[Longone1]

I had a barrel chambered with a new PTG reamer I bought. It's a 6BR reamer, the body of the chamber looks great but the neck looks like it was threaded. I discovered this with my Hawkeye bore scope, not really sure where to go from here.

Longone

 

[ridgeway]

Sounds like a smith problem to me...

 

[Longone1]

That was my first thought also until I looked at the reamer with a magnifying glass. The neck portion of the reamer looks to be poorly finished.
I compared it to a Manson reamer I have in 6 Rem. and it is pretty easy to see that the reamer is to blame.

 

[ridgeway]

That was my first thought also until I looked at the reamer with a magnifying glass. The neck portion of the reamer looks to be poorly finished.
I compared it to a Manson reamer I have in 6 Rem. and it is pretty easy to see that the reamer is to blame.

Maybe there was a chip or something welded to it during chambering?

I know what you mean by the finish on a PTG reamer. I set one beside a Henriksen and a JGS and I can visually see the finish differences on the flutes. The henriksen and jgs have a much finer finish. My PTG cuts fine.

Maybe take it all back to your smith along with a bore scope and see if he can figure it out?

If you are getting a helical screw type of finish....leads me to believe there was a chip or something welded to a flute or flutes plugged with chips while the reamer was pulled out of a moving spindle or the spindle was coming to a stop as the reamer was removed. I dunno...just throwing out some suggestions...

 

[Dave L Kiff]

All our reamers are ground on state of the art STAR 6axis CNC tool grinders , with the exception of are custom shop . We grind all our wildcats on Cincinnati tool an cutter grinders . All our tools are hand stoned by Myself and Pete on the old Red Elliot stoning fixture. If you have threaded type neck it more than likely picked up a chip. our reamers are guaranteed for satisfaction and Winning the match ,the hunt,and the day, this they do well . Reamers all look different do to the steel used , wheels used and the program used . I have seen some pretty shabby looking competitors reamers come in the shop to fix because the manufacturer said , Hell there's not a thing wrong with it . well we touch them up and they work great,. Looks can be deceiving and all reamers can pick up a weldment on the face and some times it will even pop off and others it needs to be stoned off. Thanks Dave Kiff

 

[Longone1]

That's good to know. Is it possible that a chip could damage the cutting edge? I have spoken to one of the customer service people today and followed the return procedure. I would feel a whole lot better having the folks that made the reamer inspect it to be sure there are no issues. It is in the USPO hands now.

Longone

 

[willymakit]

I purchased a finish reamer to have my very capable smith chamber two(2) barrels. One chamber is picture perfect, as inspected with the Hawkeye, The other has a "groove" where a chip was caught. So....... does one chamber perform different than the other? I bet not. The more important thing to me was the perfect leade area from the throat to the lands, no sign of a burr!!! Only my .02 worth
BTW, the reamer was a beautiful PTG. thank you, Dave
willi

 

[Rustystud]

I can not speak for other gunsmith chambering methods or process. I can tell you I have used almost every reamer manufactures reamers. For the last ten years I have chosen PT&G reamers for two reasons: 1. Quality 2. Service. When you cut several hundred chambers per year, you will encounter an issue from time to time. Dave Kiff and his staff have always gone the extra mile for me. I have learned over the 40+ years I have been chambering rifles to understand the dynamics of reamers. Most reamers today are so far ahead of what we used ten years ago that many gunsmith and manufactures don't know how to use them. If a gunsmith is not using a high pressure flush system he can not run today's reamers at the speeds and feeds they are made to run/cut. Chip weld and tool wear become problems in short order.

 

[Longone1]

So help me to understand, if a chip does get between the reamer and the barrel is the chip then acting as button? So it would actually be engraving the rings in the neck (in this case) rather than cutting that material?

Just trying to understand and learn.

Longone

 

[Preacher]

You can bet you'll leave grooves in the chamber if a chip gets caught between the reamer and the work...

 

[Heavy barrel]

I've been told those are accuracy rings.

 

[Illinois_shooter]

Several things can cause this, but the most likely is the chip in the reamer. Feed slowly, clean every .060 and use a lot of cutting oil. I have 45 years as a Smith and have used PTD reamers for a long time with absolutly no problems of the reamers fault.

 

[dbramley]

There are no doubt people way more qualified than myself here, but after cutting several chambers very slowly keeping chips to a minimum I have still found small scratches etc. just cut my first chamber with a flushing system, chamber almost looks polished! Imagine how happy I was to see that. PTG are great people, they must be crazy busy and I have had my share of "ordering" issues but they are great people doing their best, I feel they make a great product and have alway done right by me, may just take a while.