MFS ammo leaving fouling in barrel

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Wildcard91

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Has anyone ever had this problem with MFS?

I have been cleaning my AR15 for the last three days and only made moderate progress.

I shot about 500 rnds of MFS at the range. Soaked the bore thoroughly with CLP before leaving the range and ran a bore snake through the barrel when I got home. Put a light coat of clp in the barrel, locked it up, then come back the next day to thoroughly clean out the rest. I always finish off with a run through of Butch's bore shine to take out any copper in the bore. This has always left my barrel spotless when shooting winchester ammo. However, with the MFS, my barrel is still filthy as crap.

I have spent three days cleaning the barrel and there is still fouling caked onto the grooves of the bore. Although the majority of it is out, there are still stubborn areas that are caked on. I have soaked the barrel with Butch's boreshine over three nights, and ran at least 100 patches through. The first 50 patches came out blue and the rest are now coming out black. I've even used several runs with a bore brush and I still have no luck getting the fouling out of several areas for the bore.

This must be the dirtiest surplus ammo I have ever fired. Does anyone have any better advice on how to get this $h1t out of my barrel?

Another interesting point of observation is that the 308 MFS ammo has never caused this problem with my M14, which still looks like a mirror in the bore. Any thoughts?
 
Thanks for the warning. I'll stick to .223 handloads. Usually the powder is the culprit.
It reminds me of some 7.62x54 Russian surplus I have. 50 rds and the bore is filthy.

Been using RemClean/40X Bore cleaner or JB Paste for all my guns for the past 20yrs. Does it all very quickly.
 
You could try ammonia or wipe-out. I had the exact same problem with my Enfield, it would take 3 days to clean because I'd leave a solvent in over night, clean it the next day for 20 minutes, and keep going. Eventually I gave up trying to get the patches to come out white, and just said good enough once I figured most of the copper fouling had been removed.

I used Wipe Out twice and that thing came out squeaky clean, it only took a couple 1-hour sessions I could not believe what I was seeing.
 
Wipe out is awesome stuff. Most of my guns only get re-lubed periodically during the summer, but everything gets a dose of Wipeout through the barrel at least once a year to remove copper fouling and gunpowder reside from rifling grooves.
 
Honestly I have not had a problem feeding, extracting or grouping with this ammo. For the price it seemed worth while until I started cleaning my AR. Although I dont have problems with the larger groups, I do have problems spending this amount of time cleaning the barrel. The time spent cleaning more than makes up for the price difference when going with premium ammo. As they say: Time is money.

I'm already using an ammonia solvent. Butch's says it has ammonia salts in the ingredieants. Will this wipe out stuff work better?
Anyone have advice on how to get the rest of this crap out more effectively? Am I just SOL and stuck with repeating this process for the next couple of days?
 
I'm going to pick up a bottle of this stuff tonight. I'll update on my progress. Until then I'd love to hear what everyone else uses.
 
Wildcard91 said:
Anyone have advice on how to get the rest of this crap out more effectively? Am I just SOL and stuck with repeating this process for the next couple of days?
Click to expand...

Try it. 10 minutes and done.
One patch on jag with oil,
Wrap patch around bronze .22 brush, apply RemClean/JB on patch,
stroke back and forth 5 times,
wrap 2nd patch and do it again 5 times,
then use Hoppes or solvent with jag again for two wet patches,
look at clean bore. :)

lejarretnoir said:
Been using RemClean/40X Bore cleaner or JB Paste for all my guns for the past 20yrs. Does it all very quickly.
Click to expand...
 
lejarretnoir said:
Try it. 10 minutes and done.
One patch on jag with oil,
Wrap patch around bronze .22 brush, apply RemClean/JB on patch,
stroke back and forth 5 times,
wrap 2nd patch and do it again 5 times,
then use Hoppes or solvent with jag again for two wet patches,
look at clean bore. :)
Click to expand...

Wont this method decrease the life of the bore?

Max Owner said:
Use a bore brush?
Click to expand...
I have been using a bore brush without a swab wrapped around it before using the jag. I do this all the time and usually it does the job. I've always been told by my coach that using bore brushes in both directions of the barrel causes excessive wear.
 
Wildcard91 said:
Wont this method decrease the life of the bore?
I have been using a bore brush without a swab wrapped around it before using the jag. I do this all the time and usually it does the job. I've always been told by my coach that using bore brushes in both directions of the barrel causes excessive wear.
Click to expand...
Never. JB or RemClean does not hurt the bore, but many non-believers don't have access to a bore scope and have never worn out target rifle barrels with thousands of rounds. Make sure to use a proper bore guide. Keep the rod straight in the bore, use coated rods and brass brushes.

Don't believe me? Tony Boyer, top benchrest shooter uses JB. Many will say it's abrasive. It's non-embedding which means it doesn't scratch the steel nor does it polish it. Take some JB and rub it on on some smooth mild steel which is softer than your barrels steel, then examine under a microscope.
 
Whenever I have heinous copper fouling that requires geurilla warfare to remove, I just drag the gun out into the garage and run some Tipton bore solvent thru it. Tight double patch followed by heavily soaked single patch, soak 15 mins, brush, dry patch and repeat. Instead of 2 or 3 days to get the Garand, Enfield or Mosin clean it takes 30-45 minutes. Never open the jar in a non-well-ventilated area. You will probably die before you get the lid back on.
 
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