Iosso vs. JB's: which is more aggressive/coarser grit?
- Thread starter fatelvis
- Start date
CaptainMal
Silver $$ Contributor
I use both and frankly, think neither one works well for carbon or copper. Do think their abrasive qualities scrape about anything off if rubbed in long enough. Sure have helped me bring neglected barrels back to shooting. Also use Autosol polish for a more aggressive abrasion. Just do not think the chemicals in these products do much to dissolve copper or carbon.
For those issues I use both Bore Tech C-4 and Eliminator or just Barnes C-10 for the copper issue. These are solvents that seem to dissolve things and loosen for an abrasive removal. Seems that good cleaning requires a combination of products to get the job done properly.
For those issues I use both Bore Tech C-4 and Eliminator or just Barnes C-10 for the copper issue. These are solvents that seem to dissolve things and loosen for an abrasive removal. Seems that good cleaning requires a combination of products to get the job done properly.
Medic505
Gold $$ Contributor
Do you have a bore scope?
Raythemanroe
Bullet Whisperer
In my experience, IOSSO is more aggressive than JB. You can clean forever with JB (and get the job done) without changing the appearance of the lapped surface inside the barrel. However, aggressive use of IOSSO appeared to actually polish the surface indicating to me that some metal was being removed. Rem-Clean is the most aggressive abrasive I have ever used and it will remove metal. The Rem-Clean I used was about 25 years ago and it may have been re-formulated by now. Just don't get too carried away with removing something that may not actually be there. A borescope is the only way to really know what your cleaning regimen is doing. Once you get a scope, work on doing the minimum cleaning required to keep your desired accuracy level up. More barrels are ruined by over zealous cleaning than shooting.
my way
C4 with brushing soaking and patching first
short stroking throat and first 10 or so inches of the bore with a parker hale jag with a patch wrapped around it soaked with C4 and lightly coated with losso. this stage should only be necessary every 200 rounds or longer. borescope is the best way to tell when it needs it and when you have it clean.
follow that with patches and brushing with boretech eliminator till the losso is out and there is no blue on the patches. must use a jag that will not give a false positive.
C4 with brushing soaking and patching first
short stroking throat and first 10 or so inches of the bore with a parker hale jag with a patch wrapped around it soaked with C4 and lightly coated with losso. this stage should only be necessary every 200 rounds or longer. borescope is the best way to tell when it needs it and when you have it clean.
follow that with patches and brushing with boretech eliminator till the losso is out and there is no blue on the patches. must use a jag that will not give a false positive.
More barrels are ruined by over zealous cleaning than shooting.
opinions vary!
personally i feel a clean barrel is an accurate barrel. developing.a carbon ring will certainly destroy the precision of a fine barrel. might stop by a short range benchrest competition and tell those guys they are going to ruin those barrels with all that cleaning.
opinions vary!
personally i feel a clean barrel is an accurate barrel. developing.a carbon ring will certainly destroy the precision of a fine barrel. might stop by a short range benchrest competition and tell those guys they are going to ruin those barrels with all that cleaning.
tmwinds
Gold $$ Contributor
I think smokinjoe might have fired a few rounds in short range competition.
AckleymanII
Gold $$ Contributor
Iosso is MUCH more agressive than JB. I will not use IoSSO in any high quality barrel unless it is a caliber that is way overbore like a 22-243 AI, as there is no need for it. Good Brushes get the job done, throw them away often. Montana copper cream on a few patches, seems to be the equal of JB without all the mess.
Brownell's has a deal on Lyman bore scopes now.
Smok'en Joe's response is dead nuts. Isso will remove metal, quickly.
Brownell's has a deal on Lyman bore scopes now.
Smok'en Joe's response is dead nuts. Isso will remove metal, quickly.
I thought i knew how to clean a rifle bore, that was until i got a bore scope. Then i realized i did not know as much as i thought i knew.
Dusty Stevens
Shiner
Blue or red jb?
I think smokinjoe might have fired a few rounds in short range competition.
and as i said opinions vary? i don't think there is any consensus on barrel cleaning even among the most accomplished shooter. an interesting read. seems everyone does it differently.
http://www.accurateshooter.com/technical-articles/barrel-cleaning-debate/
I have had my scope for many years and I have tried just about everything there is to try. It is my understanding that Iosso contains an abrasive, but it is a very high polish type so it is not aggressive. You would have to really rub on a bore a lot to change anything. JB Bore Cleaner, the gray {or maybe blue} stuff does not. Supposedly the active ingredient is chalk. The only thing you will change with that is the copper, as in gone. The red JB Bore Bright absolutely has polish in it and it will polish right over top of copper or carbon. You really have to have a whistle clean bore to use it in and even then I found it to increase copper fouling in the three barrels I have used it on.
As far as the dread carbon ring in the throat...none of the above did much, if anything at all. I guess eventually maybe I could have gotten somewhere, but that seemed like too much work. The only "gun product" I have found effective was that stuff called "Witches Brew" and even then I had to use a bronze brush in a drill. I found that carbon specific automotive carburetor products like 2+2, etc. used with a drill and a bronze brush were very effective. Just don't put it into the rifling and let it spin...a quick touch in the throat {just a few seconds} while flooded with carburetor cleaner works very quickly for me. This is where a borescope comes in handy...you really don't want to do this to your barrel any more than it needs to get the carbon out. In fact, these days when I get carbon I like to plug the bore and soak it with carbon cleaner rather than spin a brush.
As far as the dread carbon ring in the throat...none of the above did much, if anything at all. I guess eventually maybe I could have gotten somewhere, but that seemed like too much work. The only "gun product" I have found effective was that stuff called "Witches Brew" and even then I had to use a bronze brush in a drill. I found that carbon specific automotive carburetor products like 2+2, etc. used with a drill and a bronze brush were very effective. Just don't put it into the rifling and let it spin...a quick touch in the throat {just a few seconds} while flooded with carburetor cleaner works very quickly for me. This is where a borescope comes in handy...you really don't want to do this to your barrel any more than it needs to get the carbon out. In fact, these days when I get carbon I like to plug the bore and soak it with carbon cleaner rather than spin a brush.
Same here. Bore-Tech cleaners every 60-80rds. Iosso brushing every 150-160rds or so with focus in first 1/3 of bore.
What I want to know why does everyone start cleaning the barrel before the chamber, start with the CLR or Brake clean on a brush and patch and clean your chamber before you insert your bore guide. Now you aren't grinding the bore guide into the carbon in the chamber. Once that's clean now start your barrel!
Joe Salt
Joe Salt
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