Thorroclean slow down the barrel?

[Mahziar]

I just used the bullet central Thorroclean on the 6.5 cm barrel that I had cleaned last month

Barrel has 658 Rounds on it and it was shooting in .1s and .2s
41.3grs H4350@2810fps with Berger 144.

I always used only boretech c4 and cu+ and brush with bronze brush in between the solvents on this barrel.
After cleaning with Thorroclean I was able to take out whole lot of carbon from the first 5 inches of the barrel with 30 strokes of 30 cal iosso nylon brush and Thorroclean.

my only concern now is the barrel slow down since I am reading everywhere that this is a watered down iosso paste. I have a busy schedule and don’t know when I am gonna be able to shoot!

Does anyone have any experience with the barrel slow down with this product?

Thanks

 

[SSchnd]

I just used the ThorroClean on a 223 30" T/R barrel. It took a lot to get the carbon out of the bore.
I used the Iosso brush also. I ended up going back to my JB paste/Kroil to get the barrel down to bare steel after about 100 strokes combined 3 cleaning steps using ThorroClean.
Not so impressed with the ThorroClean yet. TBD if I am a proponent.
I had used C4 before this and the dry patches were coming out clean before bore scoping the layer of carbon.

Sadley I did not have the chrono last Saturday when I fired it again. I ran 6 rounds through it using a 1/2" dot for fowler shots it seemed to settle after 4 shots.
The subsequent group of 20 was a 1/2" hole of 17 shots with 1 low ten and two high tens all on me.
Sorry I cannot confirm velocity was the same or not though.
I did not see any ill affects going back to a bright clean bore after those few fowling shots.

 

[CADDIE5]

Did you use 6mm Iosso brush on 223rem barrel with thorroclean? I had bad carbon ring took a lot of elbow grease with jb and carbon 4. Carbon ring gone. We had an ISRA F Class League demo on cleaning barrels better with my rifle. Buddy borescoped my 223rem brux bbl not clean enough so he used accelerator/patchout... Followed by thorroclean & flush to get my barrel clean and shiny. Now it's up to me to keep it that way. Bought thorroclean kit from bc then ordered iosso brushes, more patches, and patchout/accelerator from midwayusa. Lesson learned.

 

[SSchnd]

Did you use 6mm Iosso brush on 223rem barrel with thorroclean? I had bad carbon ring took a lot of elbow grease with jb and carbon 4. Carbon ring gone. We had an ISRA F Class League demo on cleaning barrels better with my rifle. Buddy borescoped my 223rem brux bbl not clean enough so he used accelerator/patchout... Followed by thorroclean & flush to get my barrel clean and shiny. Now it's up to me to keep it that way. Bought thorroclean kit from bc then ordered iosso brushes, more patches, and patchout/accelerator from midwayusa. Lesson learned.

I got two brushes need to double check. This was not a carbon ring issue as I put a wet C4 patch on a brush and stuff it into the throat to soak before each cleaning and that has worked well.

I can try to 264 bore brush next time. I will need to check if I got a 223 or a 30 cal brush.
The brush I am using (Iosso) is pretty snug in the bore.

Do you get a wet feeling when doing the brush then after numerous strokes it tends to feel more, how can I say, sludgy, more drag? So after 15-20 strokes I am pulling the rod and resoaking the brush with cleaner.
Follow up dry patch, then wet until clean patch and a dry to finish.

Caddies, is your first name Mike?

I checked I bought a 223 and .264 brush.

 

[David101]

Its not the product that causes the slow down but having a clean barrel. From the experiments my rifle club have done we found on average a 6fps slower first shot or what a lot of people call cold bore shot. better term would be clean bore shot. By the third shot the speed was back to the normal operating speed.

 

[Mahziar]

Its not the product that causes the slow down but having a clean barrel. From the experiments my rifle club have done we found on average a 6fps slower first shot or what a lot of people call cold bore shot. better term would be clean bore shot. By the third shot the speed was back to the normal operating speed.

Thanks for the reply
All with Thorroclean?

 

[swd]

You probably had enough carbon buildup to increase pressure and. Noe the bore is back to normal. Add enough powder to bring the speed back and see if comes back in tune.

 

[Mahziar]

You probably had enough carbon buildup to increase pressure and. Noe the bore is back to normal. Add enough powder to bring the speed back and see if comes back in tune.

Barrel was always clean during my testing
Just the stubborn carbin in the first 5 inches of the grooves.
Carbon in the grooves causes pressure?

 

[CADDIE5]

I got two brushes need to double check. This was not a carbon ring issue as I put a wet C4 patch on a brush and stuff it into the throat to soak before each cleaning and that has worked well.

I can try to 264 bore brush next time. I will need to check if I got a 223 or a 30 cal brush.
The brush I am using (Iosso) is pretty snug in the bore.

Do you get a wet feeling when doing the brush then after numerous strokes it tends to feel more, how can I say, sludgy, more drag? So after 115-20 strokes I am pulling the rod and resoaking the brush with cleaner.
Follow up dry patch, then wet until clean patch and a dry to finish.

Caddies, is your first name Mike?

I checked I bought a 223 and .264 brush.

No Steve. Mike is OldDog2

 

[rlporter507]

I watched a video, cant remember if it was John or not, said thorro clean is NOT watered down Iosso paste.
my spread sheet shows avg vel for a 77smk was only 1fps different, and my 80.5 berger was 18fps different after a good thorro clean with 60 strokes total. but the lower vel on the 80.5 was 10 degrees colder that day, at 45 vs 55. both groups were 20 rds.

 

[Mahziar]

I watched a video, cant remember if it was John or not, said thorro clean is NOT watered down Iosso paste.
my spread sheet shows avg vel for a 77smk was only 1fps different, and my 80.5 berger was 18fps different after a good thorro clean with 60 strokes total. but the lower vel on the 80.5 was 10 degrees colder that day, at 45 vs 55. both groups were 20 rds.

That sounds normal
I don’t like using abrasives since I know they will open up the throat causing super slow barrel
Ask me how I know!

 

[swd]

Yes, enough carbon can build pressure enough to change your tune especially if it’s been a chronic problem.

You probably had enough carbon buildup to increase pressure and. Noe the bore is back to normal. Add enough powder to bring the speed back and see if comes back in tune.

 

[ahusted1978]

Makes sense that it would appear to slow down, until you get a few foulers through it.

 

[Mahziar]

Makes sense that it would appear to slow down, until you get abfew foulers through it.

Yes, but What I experienced with the JB Bore paste was permanently slowed down the barrel about 75 fps

 

[ahusted1978]

Yes, but What I experienced with the JB Bore paste was permanently slowed down the barrel about 75 fps

I typically use a combination of solvents and abrasives namely Iosso bore paste and have not noticed any significant, permanent slow down. Just by removing fouling from a barrel should not permanently slow it down. If said barrel is at the end of its life, now that is a different story.

 

[boltfluter]

That sounds normal
I don’t like using abrasives since I know they will open up the throat causing super slow barrel
Ask me how I know!

Abrasives are not the problem in reality, it is how they are used. I use them in all my barrels quite successfully and have never had any problems. With this type of product or any type of abrasive, the statement "less is more" has real meaning. Just my personal experience so far. I also run moly in most of my rifles and this combination just flat works for me. First shot is always in the group or drops the coyote without any fouling shots. Flame suit on, let me have it!
Paul

 

[Mahziar]

Update:
So far after 2 cleaning and 100 Rounds I didn’t see any drop in velocity but I saw better accuracy and the velocity comes back up to where it was after 3 shots

 

[Bigdaddy405]

I used wipeout patchout pretty religiously & thought I had clean barrels until I purchased a bore scope, from start of lands for about 8 inches was black then rest of barrel shiny. used thorroclean as directed with losso brushes probably two sessions on each rifle I own & black was gone on all. 6BR, 6 CM, .223 fullbore & .204 Ruger. I have tried JB bore paste before also & it didn't take out as much carbon as Thorroclean. first patches were very black.

 

[Mahziar]

I used wipeout patchout pretty religiously & thought I had clean barrels until I purchased a bore scope, from start of lands for about 8 inches was black then rest of barrel shiny. used thorroclean as directed with losso brushes probably two sessions on each rifle I own & black was gone on all. 6BR, 6 CM, .223 fullbore & .204 Ruger. I have tried JB bore paste before also & it didn't take out as much carbon as Thorroclean. first patches were very black.

I still have a little bit of black in the first 6-8 inches but definitely a lot cleaner comparing to what it was. I watched @fclassjohn video and looks like he is very happy with the results he is getting

 

[Ackley Kid]

Depending on how “deep “ your clean is , it’s normal to loose some velocity. When running a very aggressive clean ( abrasives ) it may take up to 2-6 shots for velocity to peak again …..

Long story short , I had a match barrel that was over lapped and when cleaned it would take copious amounts of fouling shots before it would stabilize again . I called the manufacturer about it , and they said “ we hired a new lapper “ Barrel would shoot , but took 12-16 rounds to “ foul out “ and shoot again . Lesson learned …