Iosso

I think I found the best cure for my tight barrel, it was in my closet inside a skinny box.
After about 250-300 unimpressive shots fired!

If your up for an experiment you could fire a 50 round pack of Tubbs lapping bullets thru the barrel. Picked up a 25-06 with a custom barrel on it. The barrel didn't look to bad, had quite a bit of boring marks but lands looked good. Barrel pressured up well below max book loads and copper was end to end in 10 shots. Fired the 50 rounds of lapping bullets, 10 each of 5 different grits. Gained around 4 thousands of throat but copper and pressure problems were gone. Accuracy was good and has gotten a little better after around 50 rounds down the barrel. This barrel was headed for garden stake bin so was a nice suprise to see it come around.

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you used FF type if they were different grit, i didn't catch that earlier.
A Tubb employee warned me against using them in a lapped barrel.
But, if it's about to get replaced anyhow it can't hurt to try.
I'm just tired of burning powder and primers on it.

Final Finish pack , think the TMS is throat maintenance system.

cape cove said:

Doesn't Ez-Off have some type of an acid in it. I know when my wife cleans the oven there is an acid type of smell. Could be hard on the bore, maybe.

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Or ammonia ?

MagnumManiac said:

I scrubbed this barrel with JB Bore paste for 2 hours, 20 strokes with each new patch, it hardly touched the black stuff…
This was a new REM 700 LR in 300WM, then I got the new REM 700 Sendero II in 7RM, and it had the same black deposits, which you can 'feel' with a dry patch
I cannot get Iosso here, does anyone have borescope pics of before and after?

Cheers.

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I've been testing Free All penetrating oil, available in our automotive supply shops. It seems ro soften the carbon to the point that it is more easily removed.

Perhaps this or another carbon remover is available to you. I've also found that Iosso or JB Bore paste used in conjunction with it helps. Just another tool in the tool chest.

Removing stubborn carbon deposits is a chore no matter what. We're just finding more efficient ways to remove it.

Tiny Tim said:

I've been testing Free All penetrating oil, available in our automotive supply shops. It seems ro soften the carbon to the point that it is more easily removed.

Perhaps this or another carbon remover is available to you. I've also found that Iosso or JB Bore paste used in conjunction with it helps. Just another tool in the tool chest.

Removing stubborn carbon deposits is a chore no matter what. We're just finding more efficient ways to remove it.

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Thanks for the heads up, but our chemicals here are very limited.
Those barrel pics I showed are not from firing, that is what was left in 2 barrels that I cleaned straight after purchasing. I believe it is from whatever lube Remington used when those barrels were buttoned.
The SPS was 2015 build and I bought it in 2020, had been shelved all that time.

Cheers.

Tiny Tim said:

I've been testing Free All penetrating oil, available in our automotive supply shops. It seems ro soften the carbon to the point that it is more easily removed.

Perhaps this or another carbon remover is available to you. I've also found that Iosso or JB Bore paste used in conjunction with it helps. Just another tool in the tool chest.

Removing stubborn carbon deposits is a chore no matter what. We're just finding more efficient ways to remove it.

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I'm liking that free all more and more.

Lmao. Thanks for all the great cleaning tips guys. And I tell people my wife can smell a mouse fart from 500 yards away.

crashlanding said:

I'm liking that free all more and more.

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I tested the free all also. It didnt remove the hard packed carbon but did remove the powder fouling and loose carbon. It has a nitrocellulose solvent in it but after the nitrocellulose is burned it is just carbon and it is hard packed by the bullets. JME

For those of you that have used Free all and Kroil, which one works better in your opinion?
I have used Kroil, Losso and JB bore paste for
years and they work but it sure takes a lot of scrubbing. I usually start with Patch Out to get the easy stuff out. Thanks

MagnumManiac said:

Thanks for the heads up, but our chemicals here are very limited.
Those barrel pics I showed are not from firing, that is what was left in 2 barrels that I cleaned straight after purchasing. I believe it is from whatever lube Remington used when those barrels were buttoned.
The SPS was 2015 build and I bought it in 2020, had been shelved all that time.

Cheers.

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Do they not test fire the rifles before leaving the factory? Sure looks like carbon. Either way, it certainly is stuck on there.

I have used David Tubbs bullets for years. I recommend that you do start with the final finish bullets, and while his instructions say clean after every 10 shots, I have found that it works better when you clean after every five that way the "grit" on the bullets Has more effect on the tool marks in your barrel.