Long Range Hunting Online Magazine


Go Back   Long Range Hunting Online Magazine > Rifles, Reloading, Optics, Equipment > Rifles, Bullets, Barrels and Ballistics


Reply

barrel question. Could a ss barrel be too hard to ream????

 
LinkBack Thread Tools Display Modes
  #8  
Old 12-07-2005, 11:08 PM
Silver Member
 
Join Date: Sep 2005
Location: South Central Missouri
Posts: 291
Re: barrel question. Could a ss barrel be too hard to ream????

[ QUOTE ]
Oldfamily,

Could we get a little more information about the reamer. I would assume its a live piloted reamer but want to make sure. If its a solid piloted reamer that has a pilot diameter to large for the bore, you will snap a reamer very easily as the neck of the reamer will be stressed before the body of the reamer engages the barrel fully.

Is your smith cutting a full cut with the finishing reamer or hogging most of the material out with a drill or roughing reamer first?

Not saying your smith is doing anything wrong, it could just be several different things causing this. Like your doing the best thing to do is see what the the barrel maker says and then try to see if it is a reamer issue.


Kirby Allen(50)

[/ QUOTE ]Live pilot, hogged out, I am sending the reamer and barrel back to see what they make of it. The first reamer broke on a .003 cut, one way to look at it is this is the way my luck runs. thanks all
Reply With Quote
  #9  
Old 12-07-2005, 11:40 PM
Gold Member
 
Join Date: Feb 2005
Posts: 630
Re: barrel question. Could a ss barrel be too hard to ream????

I know what you are talking about. Had similar problems with a 257 stw. My barrel would chattter from 12 rpm all the way to 400 rpm with my reamer light feed to excessivly heavy feed.

The reamer maker told me that the 25 cal pilots are the smallest large diameter pilots he makes, I can send the reamer back an have the pilot shank reground to a smaller diameter and put a thicker bushin on it.

The barrel manufacture took my barrel and reamer and got it to work with out the chattering, i think they removed the bushing and used it as a solid pilot reamer. [img]/ubbthreads/images/graemlins/frown.gif[/img]

I already told the barrel manufacture that if it did not meet my accuracy requirements that i would require a full refund. They did not seem to want to talk about refunds at all.

Definatly my last barrel from them

da
Reply With Quote
  #10  
Old 12-08-2005, 10:26 AM
Official LRH Sponsor
 
Join Date: Jun 2004
Location: Fort Shaw, Montana
Posts: 6,807
Re: barrel question. Could a ss barrel be too hard to ream????

4ked Horn,

Maybe the term "harder" is not the correct term that I should have used. How about more brittle??

I would agree that stainless will often machine with continuous foil type chicks as 4130 and 4140 will often chip off into much finer chips.

I will also agree that if you push things to hard with stainless you will get burned, literally!! As you stated with the drill bits and Knurling cutters.

That said, when chambering a rifle, it is much easier to get a fine chamber finish using a tool steel reamer with Stainless barrels then it is with 4130 or 4140 barrels.

Stainless is much gummier when machining then chrome moly. Cutters and reamers need to be watched very carefully when machining stainless and cutting speeds and lubricant levels are much more critical as well.

But when everything is set up correctly, I have always found stainless barrels to be easier to machine then chrome moly. Just my experience dealing with rifle barrels only, not differnet grades of heat treated steel.

I do now that some heat treated stainless steel is nearly impossible to machine no matter what type of cutting tools you use. Can be said for chrome moly as well though.

I have also found that Lilja stainless barrels chamber with less effort that say a Krieger or Broughton. I am sure due to allow used and heat treatment of the blank.

Good Shooting!!

Kirby Allen(50)
__________________
Kirby Allen(50)

Allen Precision Shooting
Home of the Allen Magnum, Allen Xpress and Allen Tactical Wildcats and the Painkiller Muzzle brakes.

Farther, Faster and Flatter then ever before.

Web Page: www.apsrifles.com

allenmagnum@gmail.com
Reply With Quote
  #11  
Old 12-08-2005, 11:31 AM
Silver Member
 
Join Date: Oct 2004
Location: Boise
Posts: 466
Re: barrel question. Could a ss barrel be too hard to ream????

As a MSE degree student this topic intrigues me. I would think the grade ss makes a difference to. For instance if you are working with a martensitic steel. 410 found in like Krieger barrels are this type of steel. Where Lilja uses 416, a "machinable" steel. I would think this would effect drill wear.
Reply With Quote
  #12  
Old 12-08-2005, 11:39 AM
Silver Member
 
Join Date: Oct 2004
Location: Boise
Posts: 466
Re: barrel question. Could a ss barrel be too hard to ream????

Broughton uses 416R. I went and looked up a data sheet on it. It is a hardened version. Kirby I think this answers why you see the difference.
Reply With Quote
  #13  
Old 12-08-2005, 12:03 PM
Silver Member
 
Join Date: Sep 2005
Location: South Central Missouri
Posts: 291
Re: barrel question. Could a ss barrel be too hard to ream????

The one thing that has me wondering is that I had the barrel ordered for 14 weeks and no barrel. Called and asked and they said they did not have any. Then I told them that I had been waiting that long and all of a sudden I have a barrel sent out that evening. I am thinking that the barrel turned into a rush job just to shut me up. Looked at the website for the company and they did not say what steel they were using. Too many what ifs are going through my mind I do know that the chamber end of the blank did have a somewhat strange sound to it, I know the size would make up for some of the difference compared to the muzzle end, just that it was an odd thing that I did notice when checking the barrel when I got it. The contour is a #5 and the one thing that caught my eye with it was that the contour had a bulged look to it after it got to 26 in. I had ordered a 30 in blank the end result was that the turning was not uniform and the barrel does not have the even contour that I would think that it would have. Kind of like a bite out of the metal. Don't know if this is normal, but that was the first thing that I disliked with this barrel. Oldfamily.
Reply With Quote
  #14  
Old 12-08-2005, 12:38 PM
LB LB is offline
Silver Member
 
Join Date: Jul 2004
Location: Upland, CA
Posts: 423
Re: barrel question. Could a ss barrel be too hard to ream????

I'm not a gunsmith, (or a lawyer) but have used a lathe and a drill press, before. I don't even know if chamber reamers are available in M42, carbide, HSS or it depends on the barrel steel, but speed and lubrication are critical, as is the pressure to create friction. I dropped a muzzle heavy straight cylinder ss barrel rifle off a bench once. It dented like brass. No problem, just recrowned, good as new. Seems to me that most stainless alloys used for barrels are not hard, they just resist heat better than CM and you pay more money because the tooling doesn't last as long. I think a decent lubricant for stainless is plain water, oils are usually bad.

At this point, you can't say if it is the operator, the tool or the material.

But, the topic question: "could a ss barrel be too hard to ream????" Probably not? Some stainless type nickel steels hardened for knives are a different story, but most ss alloys are relatively soft, some are magnetic.

Good hunting. LB
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes


Similar Threads for: barrel question. Could a ss barrel be too hard to ream????
Thread Thread Starter Forum Replies Last Post
barrel question bjohnson_7 Rifles, Bullets, Barrels and Ballistics 2 11-22-2010 08:57 PM
Barrel run in question Topshot Rifles, Bullets, Barrels and Ballistics 1 03-26-2009 09:55 PM
One more Edge question Too Hard on My Brass? montana_native Rifles, Bullets, Barrels and Ballistics 7 03-25-2009 08:10 AM
Barrel question??? jmeier1981 Long Range Hunting & Shooting 3 12-30-2007 10:51 AM
barrel question Daniel Ludwig Rifles, Bullets, Barrels and Ballistics 4 12-01-2004 11:08 PM

Current Poll
Do you archery hunt for elk?
YES - 30.46%
53 Votes
NO - 54.60%
95 Votes
Not yet, but I plan to. - 14.94%
26 Votes
Total Votes: 174
You may not vote on this poll.

All times are GMT -5. The time now is 05:10 PM.


Powered by vBulletin ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Management Powered by vBadvanced CMPS
All content ©2010-2014 Long Range Hunting, LLC