The Firing Line Forums

Go Back   The Firing Line Forums > The Hide > The Art of the Rifle: Semi-automatics

Reply
 
Thread Tools
Old November 13, 2012, 12:37 PM   #26
Sweet Shooter
Senior Member
 
Join Date: June 17, 2011
Posts: 502
@ Skans...

I agree. I'm not seeing a loss of accuracy, and in fact have been surprised seeing improvements.

A well made barrel is a well made barrel. Of course there's little hope for a dogs leg of a barrel that has subsequently been preserved in that state by chrome lining.
-SS-
Sweet Shooter is offline  
Old November 13, 2012, 12:38 PM   #27
stubbicatt
Senior Member
 
Join Date: September 15, 2007
Posts: 1,068
There are advantages to the chrome lined barrel. True. I wonder though, why does the .mil obtain "nitrided" or "melonite" M2 50 cal barrels then? From what I have read elsewhere that the melonite process yields a more wear resistant barrel than chrome.

I do not know whether it is similarly resistant to rust and corrosion, however.
stubbicatt is offline  
Old November 13, 2012, 02:49 PM   #28
Skans
Senior Member
 
Join Date: November 20, 2008
Posts: 7,794
Because chrome lining barrels involves toxic substances and EPA restrictions makes this process prohibitive, unless you are doing very large orders.

In fact the availability of chrome lined barrels is one of the major advantages to owing an AR, or even an AK. Now, if they would only make AR receivers in steel and gas pistons for .308, they'd almost be as good as a FAL.
Skans is offline  
Old November 13, 2012, 09:45 PM   #29
johnwilliamson062
Senior Member
 
Join Date: May 16, 2008
Posts: 6,791
Melonite trumps chrome for durability and corrosion resistance. I am surprised by claims of accuracy. Nitrided guns are noticeably textured when compared to blued, chrome, stainless. I can't imagine that texture led to a decrease in accuracy. I have nothing scientific backing that belief though.
__________________
$0 of an NRA membership goes to legislative action or court battles. Not a dime. Only money contributed to the NRA-ILA or NRA-PVF. You could just donate to the Second Amendment Foundation
First Shotgun Thread First Rifle Thread First Pistol Thread
johnwilliamson062 is offline  
Old November 13, 2012, 10:13 PM   #30
Metal god
Senior Member
 
Join Date: April 10, 2012
Location: San Diego CA
Posts: 1,977
Quote:
Melonite trumps chrome for durability and corrosion resistance.
Is this a general statement as to coating metals as a hole ? Or are you being spesific to chrome lining the bore , chamber , BCG ,and gas key . Like I said in a post earlier I do not know much about the process or how it compares .
__________________
As of this date 8-18-14 at 6:42am I became a proud grandfather I guess I'm officially old
Metal god is online now  
Old November 13, 2012, 10:39 PM   #31
arizona98tj
Senior Member
 
Join Date: December 10, 2007
Location: Arizona
Posts: 957
If you have a little time, do some research on the net....you'll find info about it.
__________________
stu-offroad.com
Largest Jeep TJ project site on the web!
(now with guns)
arizona98tj is offline  
Old November 13, 2012, 11:35 PM   #32
Metal god
Senior Member
 
Join Date: April 10, 2012
Location: San Diego CA
Posts: 1,977
Did a little research and I do mean a little . This is what I found so far .

The MELONITE and QPQ process increases fatigue strength about 100% on notched components made from unalloyed steel parts and about 30-80% on parts made of alloyed steels.( like a barrel ) The hardness is maintained up to about 930�F and extends the surface life of steel tools and components exposed to heat.

This study shows how hot the external temp of a M4 barrel can get ( page 24 ). Well over 1,000 degrees with very high rates of fire and teeters right around the 900 degrees mark at moderately high fire rates . Im sure the actual bore gets much hotter then the 930 degrees the melonite is designed to withstand .What does this mean to 99.9 % of us ? Most likely nothing .
http://www.dtic.mil/cgi-bin/GetTRDoc?AD=ADA019649

Now for chrome lining I'll be back
__________________
As of this date 8-18-14 at 6:42am I became a proud grandfather I guess I'm officially old
Metal god is online now  
Old November 16, 2012, 02:06 AM   #33
johnwilliamson062
Senior Member
 
Join Date: May 16, 2008
Posts: 6,791
Nitriding is an incredible firearm finish. I am a little bit crazy about finishes. IMO nitriding is way beyond anything else out there on every measure of utility. It is used heavily in Europe. To get a gun in the US with it you have to look hard or buy a European gun. I don't think it is even that expensive to do.

It is the ugliest finish though. Look at a Glock slide after it is holstered just a few times. Where it rubs the color changes. Drives some people crazy.
__________________
$0 of an NRA membership goes to legislative action or court battles. Not a dime. Only money contributed to the NRA-ILA or NRA-PVF. You could just donate to the Second Amendment Foundation
First Shotgun Thread First Rifle Thread First Pistol Thread
johnwilliamson062 is offline  
Old November 16, 2012, 08:08 AM   #34
Skans
Senior Member
 
Join Date: November 20, 2008
Posts: 7,794
Quote:
It is the ugliest finish though. Look at a Glock slide after it is holstered just a few times.
You think that makes a Glock ugly!!!
Skans is offline  
Reply

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 02:25 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
This site and contents, including all posts, Copyright © 1998-2014 S.W.A.T. Magazine
Copyright Complaints: Please direct DMCA Takedown Notices to the registered agent: thefiringline.com
Contact Us
Page generated in 0.07339 seconds with 7 queries