new barrel break in / fire lapping - The Outdoor Community
LinkBack Thread Tools
post #1 of 23 (permalink) Old 10-28-2010, 01:12 PM Thread Starter
Frequent Contributor
Join Date: Nov 1999
Location: Juniata Co.
Posts: 979
Back To Top
new barrel break in / fire lapping

interested to hear your thought on breaking in a new deer rifle barrel. Has anyone used fire lapping and if so, how tedious and long of a process is it. Where did you purchase the bullets? Cast or jacketed?
sweg is offline  
Sponsored Links
post #2 of 23 (permalink) Old 10-28-2010, 01:32 PM
Diehard Outdoorsman
Coureur De Bois's Avatar
Join Date: Jan 2006
Location: Southern 2G & Northern 4D
Posts: 4,268
Back To Top
Re: new barrel break in / fire lapping

Personally I never worry about it. I do fire a fouling round in a clean barrel before sighting though. I then just sight the gun in and go hunting or target shooting.
There is so much disagreement on this subject, even between so called experts, it will blow your mind.
Go to Google and type in " new rifle barrel break in " to see what I mean. Happy reading.

The way that you wander is the way that you choose,
The day that you tarry is the day that you lose.
Sunshine or thunder, a man will always wonder.
Where the fair wind blows.
Coureur De Bois is offline  
post #3 of 23 (permalink) Old 10-28-2010, 01:40 PM
Senior Member
JasonN's Avatar
Join Date: Sep 2003
Location: Warren, Pa - Clarion Co. Camp
Posts: 14,314
Back To Top
Re: new barrel break in / fire lapping

Well, I do this:

Fire three rounds(normal copper jacket bullets, nothing special). Then clean thoroughly(copper solvent and all!). Then repeat for at least 30 rounds. Usually I start to notice a difference around that 30 round mark. I try to do 50 like that...shooting 3 then cleaning well.

I don't know if it improves accuracy all that much, but in the end I get virtually no copper fouling when cleaning. Also, after my break-in I don't clean the bore very often. I may clean it after a rainy day afield, but not just for trips to the range. It's not needed and affects accuracy.

You really under estimated the ramifications of the boondoggle you have just perpetrated!
JasonN is offline  
Sponsored Links
post #4 of 23 (permalink) Old 10-28-2010, 01:48 PM Thread Starter
Frequent Contributor
Join Date: Nov 1999
Location: Juniata Co.
Posts: 979
Back To Top
Re: new barrel break in / fire lapping

Yeah, I've been doing a lot of research. I've always fired a shot, cleaned, fired / cleaned for about 10 rounds, then went to a 3 shot string for 15 rounds, then a 5 shot string until I've fired about 100 rounds. But I was hearing that fire lapping can get rid of the tool marks that eventually collect copper fouling a lot quicker. didn't know if anyone has ever tried it.
sweg is offline  
post #5 of 23 (permalink) Old 10-28-2010, 02:14 PM
Regular Member
Join Date: May 2010
Location: Cambria Co.
Posts: 1,846
Back To Top
Re: new barrel break in / fire lapping

I would highly reccomend that you don't even think about fire lapping with diamond dust... more than likely you'll clean the rifling, especially in the throat area right out.. Better off to get some JB and use it lightly with the first 10 shots you shoot, mixed with Butches....just brush lightly and that will remove most of the debris from cutting the rifling..and for the most part 99% should already be removed..if it's that bad then no amount of cleaning will remove a big slice, nick, or bur..I have a friend who tried fire lapping..he cleaned the first six inched of rifling out of the barrel, so be careful if you try it.
6-DASHER is offline  
post #6 of 23 (permalink) Old 10-28-2010, 02:57 PM
Diehard Outdoorsman
Join Date: Sep 2010
Location: Westmoreland
Posts: 3,581
Back To Top
Re: new barrel break in / fire lapping

I never use to believe in any type of break in procedure. But lately, I've moved a little off dead center.

I just purchased a new 220 Swift barrel for my Encore. Now, when I got this delivered the bore was full of machine oil and "stuff" from the factory. So, I swabbed the bore with Butch's and a patch. (Did this with about 5 different patches) Then I ran a poly brush down it, and another Butch's soaked patch.

I was still getting a light brown patch. So, I bought some JB bore paste that comes with a small amount of oil. This is the non-EMBEDDING compound that is sold. I first ran an oil soaked patch down the barrel, then I applied the past. I ran the patch (patch is fairly tight in the bore....but not "knuckle busting" tight) down the bore for 20 strokes, then I cleaned the bore with Butch's, and again, ran a dry patch down the bore.

So, I got another clean patch, soaked it with Butch's and ran it down the bore. Well....this was the first one that came back with no...and I mean NO!!! dirt on it. There wasn't a hint of brown on this patch!!

So, I'm very pleased with JB. Now....I haven't had a chance to shoot this barrel yet, but maybe this weekend.

Sethwood is offline  
post #7 of 23 (permalink) Old 10-28-2010, 03:15 PM
Regular Member
Join Date: Oct 2010
Location: Bradford County, PA.
Posts: 1,060
Back To Top
Re: new barrel break in / fire lapping

I used the Tubbs Final Finish on my 300WSM to speed up the break in process(in theory). I don't know if it made much difference or not. It shoots well and cleans easy now.

Anymore I shoot a barrel and see how well it cleans up before worrying about a specific break in routine. My match grade barrels are all hand lapped when I get them so they tend to clean up easy right from the start. The factory barrels have been touch and go. Some clean up good and shoot well from day one with no break-in. Others are so rough that no break-in regime is going to help.

wdchuckhuntr is offline  
post #8 of 23 (permalink) Old 10-28-2010, 07:47 PM
Frequent Contributor
Join Date: Oct 2009
Posts: 889
Back To Top
Re: new barrel break in / fire lapping

What you need to do to a new barrel really depends on the quality of the barrel. And the initial condition of the barrel. I have seen new barrels that need fire lapping. Some that needed a good hand lapping. Some that came hand lapped from the factory. And some that needed no lapping or initial break in.

So what are you starting with??

Normally with any factory rifle I do a good hand lapping of the barrel before I shoot the first shot. This has always been all that was needed. But I have had a couple of Savage's and one Encore Barrel that need a fire lapping. And it worked out very well in all cases.

If you have a question about what to do with a particular rifle then you really need to use a bore scope and check it out. But for any factory rifle a good hand lapping is normally a good thing.

Don't fire lap a barrel unless it really needs it. Fire lapping will remove some metal. And maybe more than you want. Tom.
HOGGHEAD is offline  
post #9 of 23 (permalink) Old 10-28-2010, 11:53 PM
Frequent Contributor
yukon375's Avatar
Join Date: Aug 2010
Location: vertigo
Posts: 638
Back To Top
Re: new barrel break in / fire lapping

if the barrel is a custom tube, i'd follow the makers instructions for break-in. a factory tube will never know the difference. and i'd never fire lap a custom.

"No State shall convert a liberty into a privilege, license it, and charge a fee therefor."

yukon375 is offline  
post #10 of 23 (permalink) Old 11-01-2010, 12:32 PM
Part of the Community
Join Date: Jun 2004
Location: Upper Bucks County, PA
Posts: 106
Back To Top
Re: new barrel break in / fire lapping

I recently purchased a Win Mod 70 extreme weather in 300 win mag. FNH makes the barrels (they make the machine gun barrels for the military). I called and spoke to a tech. He told me that there is no break in for this barrel. It should shoot right out of the box. It did.
Sinn Fein is offline  

Quick Reply

Register Now

In order to be able to post messages on the The Outdoor Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page

Posting Rules  
You may not post new threads
You may 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
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome