• This Forum is for adults 18 years of age or over. By continuing to use this Forum you are confirming that you are 18 or older. No content shall be viewed by any person under 18 in California.

Lapping Factory ARA Barrels

dusterdave173

Silver $$ Contributor
There has been some talk and discussion about folks "lapping" factory barrels for improved accuracy
It seems this is broken down into two camps--Folks that employee a professional smith that I assume pours a lead lap and smooths that bore up and the others that are just whipping out the JB Paste and Kroil and going to town polishing the bore up some.
I am guessing the first is not legal
I would also guess that the second way would be? I mean you are just cleaning a little too hard right?
Either way how on earth could it be policed? Or proven?

As scores continue to rise and matches get harder and harder to win I can see shooters doing every tiny thing possible to get an edge.

My CZ is out of the box--not bedded, barrel same as it came from the factory no re crown etc--even has a factory CZ trigger.
I have worked hard to figure out action screw torque, cleaning regimen, etc so it shoots as good as possible.
I feel like I understand my rifle and what it likes to keep it " happy" or in tune. I don't care if a MD takes it apart in front of the whole crowd. I never want to be accused of anything illegal--why taint your record and reputation??

What I do see with my own program is ammo, ammo, ammo. I have discovered I Better take at least 4 lots or more to test--I have seen ammo that works at Friday practice may fall apart the next morning before the match and another lot steps in to carry me through the day. I shoot bipod and rear bag--I am one of the last in my gang to do so--One shooter that recently upgraded to a Randolph rest described it as almost cheating it had improved his scores so much. ( he said as much as 150 points a match ) I am at the crossroads. Guess will have to buy a rest to keep hanging with them.

I shoot with a Great bunch of marksmen--I like every one of them -- I don't think any are outside of the spirit of the rules!
But I do see where the rules are open for a lot of wiggle room as there is just no enforcement present.

I came home thinking "what if" I scrub my barrel to the metal--perhaps smooth it up a little--and start over to re-season it --and just see what happens--what if I should and it is legal? Could it Hurt the barrel? I don't see how it could--am I crazy Not to Try it? OR--Is it just another psych to throw the competition off like say bullet sorting--I told folks for a long time I sorted every bullet--It was fun--soon they all had greasy fingers and had spent tons of time chasing that rabbit--I proved it no use to Me after I took all the extreme low and high weights that were in a cup--and Won a two card match with them.

This morning I am thinking get a Randolph rest and leave the rifle alone. We had a great match Sat and the winner shot 6 Perfect 2500's in Factory! I am in with some very talented and very dedicated shooters--I respect them all!

Just Monday morning quarterbacking here--
 
Last edited:
I think using a product like JB to help clean a barrel would be deemed legal. I could be wrong. If not sure get ARA to make a ruling. I've seen things at the shoots I go to that should not be allowed, such as....milled in anshutz rails, heavy Caldwell tripod front rest. This is in factory class. You never know if im going to show up with 1 of three rifles all shoot good enough for me. Ammo that would be considered crap which it is for competition or Lapua CX. But what I will have is a Harris type bipod and a rear squeeze bag.
On the rear rest part try your buddies and see how you do.
 
I agree that using an abrasive to clean, smooth, shine a barrel is probably legal. I wouldn’t do it myself because I’ve been told that a shiny barrel won’t retain the lubricant used by ammo manufacturers. I don’t believe that using lead to lap makes it shiny. JMO
 
Dave I would do everything that is legal like bedding and trigger job, which makes it easier to shoot. A decent rest certainly helps a lot but it must fit your forend well and there is quite a learning curve to get proficient. I have a low end Bald Eagle that works fine, given the proper bag rider. Go for it!

Your barrel is broken in well by now, so it is difficult to predict if an aggressive cleaning with JB would make any difference.
 
You'd have to use JB Bore Paste (green) for a long time to get any measurable changes to the bore dimensions on a chromoly factory barrel. JB Bore Bright (red) is more abrasive and probably wouldn't take as long but it's still not lapping compound.

Using something like JB to remove fouling or lead deposits is one thing. Using an abrasive (lapping compound, etc) to deliberately change the bore dimensions in attempt to gain an advantage is definitely NOT within the spirit of the ARA factory class rules. Yeah it'd be hard to prove but those who are doing are cheating...period.

As far as policing the rules. The MD can't/won't inspect every rifle to make sure all are within the rules. The shooters are supposed know the rules and should police themselves. At the bigger events they sign a form agreeing to abide by the rules. Same is understood for local events.

On a side note, there are some pitfalls when attempting to lap a barrel that's already chambered. User beware
 
Last edited:
I would never do it. If I won a match or shot a great target I wouldn’t get the good feeling from it knowing that I had an advantage. I shoot ABRA and have had two people tell me they sent their factory bolt gun off to have it slicked up. The thing is in ABRA Factory class the semi-autos are allowed to be rechambered and lapped, but the factory bolt guns aren’t allowed to be rechambered and lapped.

I think it will justify cheating in some people’s mind to have their Factory bolt guns “slicked up” too especially with the three point per card that the semi-autos get.
 
There are some guys that win the barrel lottery and lot test to find the matching ammo for their rifle. Now if you add a good set of flags, a solid foundation and learn how to read wind properly, then you have a winning combo. At most factory matches I go to 95% don't use flags or have a wind shooting strategy. I hear them shooting and complaining while the wind is twitching around, I am sitting on my hands waiting for the proper conditions. It's easy to say the other guys are cheating, then damn he's or she has put in the work (and money) to build a system that can shoot properly in the wind. Most shooters practice in low wind conditions instead of windy days. Wind will decide who wins and who doesn't, not some lapping compound. Too much focus on equipment and not the shooters ability to read wind. That's where the meat is on the bone and the best place to gain points.
 
Yea..
I don't think anyone with the JB mix was aiming to change any bore dimensions just polish up the rough edges maybe??
I am not going that way--I am just going to work on the thing I Know will work and that is myself and my head ( and maybe a rest )
My barrel as a LOT of rounds down the pipe
I've used JB Bore Paste on a couple old rimfire barrels and it doesn't polish up chromoly as much as some might think. Might be a different story with JB Bore Bright which is said to be more abrasive

As Gene (@gkgeiger) mentioned. You don't want the bore too polished or it won't hold wax like it should. This is primarily for a hand-lapped SS match barrel but I don't see why it couldn't apply to factory barrels

If you have a lot of rounds down the barrel I think that bore's good to go
 
Yea..
I don't think anyone with the JB mix was aiming to change any bore dimensions just polish up the rough edges maybe??
I am not going that way--I am just going to work on the thing I Know will work and that is myself and my head ( and maybe a rest )
My barrel as a LOT of rounds down the pipe
Your barrel, your choice, BUT, don’t do it, as stated you ‘re not likely going to change dimension, if anything you will reduce internal structure and compromise lube distribution via polishing.
know personally barrels reduced to toast via this methodology.
Lapping is only done with a lead lap and compound, anything else is cleaning/ polishing, the later universally bad.
 
Last edited:
Your barrel, your choice, BUT, don’t do it, as stated you ‘re not likely going to change dimension, if anything you will reduce internal structure and compromise lube distribution via polishing.
know personally barrels reduced to toast via this methodology.
Lapping is only done with a lead lap and compound, anything else is cleaning/ polishing, the later universally bad.
Yep I agree--Thanks--I trust your experience and insight into this game

And to be Very Clear
I have not, never will , nor are even Hinting that any shooter was or is cheating
Read that again and read my thread again gang. I think that would be Cry Baby BS--and I will never do it.

I just wanted to have a open honest look at what is being thrown about and discussed at matches and...If it would help and.. IF it was legal well then folks could decide for themselves.

I did luck up and finish second place--The winner shot six perfect 2500's in a row --I want to be just like him when I grow up
 
Yep I agree--Thanks--I trust your experience and insight into this game

And to be Very Clear
I have not, never will , nor are even Hinting that any shooter was or is cheating
Read that again and read my thread again gang. I think that would be Cry Baby BS--and I will never do it.

I just wanted to have a open honest look at what is being thrown about and discussed at matches and...If it would help and.. IF it was legal well then folks could decide for themselves.

I did luck up and finish second place--The winner shot six perfect 2500's in a row --I want to be just like him when I grow up
That is an incredible score, just out of curiosity what rifle was he shooting.
 
That is an incredible score, just out of curiosity what rifle was he shooting.
He was shooting a Bergara B14 but I will tell you he has CZ too.

He is great competitor always helpful and was one of the original first few Factory shooters so he has us all on experience.
He has taught me some things
 
Last edited:
Agree or not but yet another testament that factory target is far too easy.
Set up that way to introduce guys to some version of RFBR, but currently it’s become ridiculous.
 

Upgrades & Donations

This Forum's expenses are primarily paid by member contributions. You can upgrade your Forum membership in seconds. Gold and Silver members get unlimited FREE classifieds for one year. Gold members can upload custom avatars.


Click Upgrade Membership Button ABOVE to get Gold or Silver Status.

You can also donate any amount, large or small, with the button below. Include your Forum Name in the PayPal Notes field.


To DONATE by CHECK, or make a recurring donation, CLICK HERE to learn how.

Forum statistics

Threads
169,429
Messages
2,275,997
Members
82,046
Latest member
Tysteid
Back
Top