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Fouled bore ?

 
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  #1  
Old 05-16-2013, 07:21 PM
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Fouled bore ?

I've been working with a full custom 7WSM. The rifle has a Broughton 5C barrel. Loads that were shooting fairly well are producing noticeably larger groups and nothing seems to shoot as well or consistent as it should. Tight group then fliers seem common.

I suspected bore fouling to be the likely cause and paid more attention to the task. Using BoreTech Eliminator I can get many, many blue patches with no apparent end in sight. I only use a nickle plated jag and occasionally a nylon brush but continue to get blue patches. The bore also seems to have many tight/loose spots as the patch is pushed slowly down the bore.

As an experiment, I tried several patches of Wipe-Out "Accelerator" followed by an hour soak in Wipe-Out foam and didn't even get a trace of blue. Followed that up with Eliminator and get blue patch after blue patch and still a rough bore.

Any idea what may be going on here?
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  #2  
Old 05-16-2013, 08:33 PM
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Re: Fouled bore ?

I always thought Broughton barrels were pretty slick inside????
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Old 05-16-2013, 08:42 PM
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Re: Fouled bore ?

Quote:
Originally Posted by Varmint Hunter View Post
I've been working with a full custom 7WSM. The rifle has a Broughton 5C barrel. Loads that were shooting fairly well are producing noticeably larger groups and nothing seems to shoot as well or consistent as it should. Tight group then fliers seem common.

I suspected bore fouling to be the likely cause and paid more attention to the task. Using BoreTech Eliminator I can get many, many blue patches with no apparent end in sight. I only use a nickle plated jag and occasionally a nylon brush but continue to get blue patches. The bore also seems to have many tight/loose spots as the patch is pushed slowly down the bore.

As an experiment, I tried several patches of Wipe-Out "Accelerator" followed by an hour soak in Wipe-Out foam and didn't even get a trace of blue. Followed that up with Eliminator and get blue patch after blue patch and still a rough bore.

Any idea what may be going on here?

I have seen this with badly fouled bores and as long as you are not introducing brass/copper to the
bore from brushes and/or jags it stills needs to be cleaned.

I have also seen this with factory barrels that were not very well rifled or heat treated causing those
tight spots in the process.(These barrels were clean).

With a custom barrel, I would be shocked if this was the case.

I would recommend continuing to clean with the Bore Teck or find some Sweets 762 solvent
and trying it (Sweets is very strong and should not be left in the bore for more than 1/2 hour).

The tight spots are the copper fouled areas and copper has more drag on patches . (A clean barrel
feels like it has grease in it and is smooth all the way).

J E CUSTOM
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Old 05-16-2013, 09:49 PM
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Re: Fouled bore ?

Quote:
Originally Posted by J E Custom View Post
I have seen this with badly fouled bores and as long as you are not introducing brass/copper to the
bore from brushes and/or jags it stills needs to be cleaned.

I have also seen this with factory barrels that were not very well rifled or heat treated causing those
tight spots in the process.(These barrels were clean).

With a custom barrel, I would be shocked if this was the case.

I would recommend continuing to clean with the Bore Teck or find some Sweets 762 solvent
and trying it (Sweets is very strong and should not be left in the bore for more than 1/2 hour).

The tight spots are the copper fouled areas and copper has more drag on patches . (A clean barrel
feels like it has grease in it and is smooth all the way).

J E CUSTOM
I agree with J E 's advice almost 100%. The part I would change is I would stick with the BoreTech Eliminator. I have tested Sweets 7.62 and BoreTech Eliminator to see which was getting the most copper. BTE got more blue after Sweets was done and said the barrel was clean.

I would run 3 very wet patches of BTE and wait 10 minutes, then 3 more very wet patches. Repeat this over and over until the bore smooths up and blue lines on the patches are gone. A nylon brush is ok but would limit the strokes to 10. Go slow and stay true to the bore. Always use a good fitting bore-guide.

If this barrel is fouled as bad as it sounds be prepared to take a few evening to get it clean.

I am surprised it has fouled like this.
Was there a break in procedure used?
Are you shooting solid copper bullets?
Have you tested different brand bullets with out cleaning between?

Jeff
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Old 05-17-2013, 06:02 AM
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Re: Fouled bore ?

The barrel was " broken in" using the typical 1 shot and clean method even though I have always questioned the value of this practice on a new custom barrel.

No Barnes or other mono-metal bullets in this rifle. I shoot Berger VLD's and Accubonds almost exclusively.

I'll continue with the BT Eliminator and see how it goes.

Thanks for the feedback.
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  #6  
Old 05-18-2013, 05:37 AM
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Join Date: Dec 2001
Posts: 797
Re: Fouled bore ?

Quote:
Originally Posted by Varmint Hunter View Post
I've been working with a full custom 7WSM. The rifle has a Broughton 5C barrel. Loads that were shooting fairly well are producing noticeably larger groups and nothing seems to shoot as well or consistent as it should. Tight group then fliers seem common.

I suspected bore fouling to be the likely cause and paid more attention to the task. Using BoreTech Eliminator I can get many, many blue patches with no apparent end in sight. I only use a nickle plated jag and occasionally a nylon brush but continue to get blue patches. The bore also seems to have many tight/loose spots as the patch is pushed slowly down the bore.

As an experiment, I tried several patches of Wipe-Out "Accelerator" followed by an hour soak in Wipe-Out foam and didn't even get a trace of blue. Followed that up with Eliminator and get blue patch after blue patch and still a rough bore.

Any idea what may be going on here?
I've got a Broughton 5c on 300WSM and I cleaned after first 5 shots and that was it. I do have two cleaning rods one set up for brush other for patch and jags are from Benchrite.

I use Sweet's and I do let it soak and I tip my barrel down little.

If it was me I'd call Broughton they have a tracking system on each barrel they make by serial #.
Not sure if you ever read this

Since 2003 we have introduced 22RF, .224, .243, .264, 270, .284, .308 and .338 caliber "5C " (canted land) barrels. These barrels are showing exceptional clean ability, more velocity, longer barrel life, reduced bolt / breech pressure and extreme accuracy - shooting small groups at short and long ranges. We will expand this 5C land formation into other calibers and twist options in the future.

Each barrel is crafted with the highest of quality standards. If a barrel doesn't meet our quality standards, it does not go out the door. From start to finish we track what is being done and the results to each barrel by serial number. An individual tracking record is kept with your file for every barrel. If a customer has a question or concern about their specific barrel or would like a barrel similar as another customer, we can look it up and duplicate or continually improve the process. Our craftsman takes pride in every barrel we ship.

It is our commitment to you to craft the finest rifle barrel your money can buy. Give us a call at (920) 922-4882 to discuss your next barrel purchase. Quality, Accuracy & Customer Satisfaction is #1. We guarantee it!
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  #7  
Old 05-18-2013, 06:35 AM
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Re: Fouled bore ?

Tom H - thanks for the info. I may just give them a call.

Unbelievably, I am still cleaning this barrel. Using several wet Eliminator patches, letting it sit and then following up with more patches or the nylon brush. Blue patches are still coming out.

This morning I used several patches of JB bore paste which was short stroked through the bore. Some improvement was noted but the follow-up Eliminator patches are still light blue and the bore seems rough, better but not smooth.

This is the only custom barrel that I've had a problem with. I have several other Broughton 5c barrels and they all shoot great and clean up easily.
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