Worst powders for hard carbon fouling?

[grovey]

Endoscope cameras have become so inexpensive that there really is no excuse to not own one. Without the ability to look into the chamber/throat, you're just guessing about the effectiveness of your barrel cleaning regime and the presence of carbon buildup. I've owned one for decades, having spent hundreds of dollars on something half as good as you can get today for less than a box of cheap ammo.
I easily see any carbon build up in the throat and edge of chamber neck, and remove it with a wire brush. And when measuring distance to lands with a new bullet, I start with a verified clean throat/leade so I don't get a false measurement. Here are some examples of some inexpensive cameras that will more than suffice.

https://www.amazon.com/dp/B06Y6D4KXC/?tag=accuratescom-20
https://www.amazon.com/dp/B00JERRES6/?tag=accuratescom-20
https://www.walmart.com/ip/Waterpro...Borescope-for-Android-Smartphone-PC/873783136

So your putting these in your chamber to see the throat and beyond?

 

[Bc'z]

[/QUOTE]
Theory as I understand it that by brushing in reverse you could drop powder foulings into the trigger and action. Not sure I ever heard anything about barrel wear.[/QUOTE]
I got this one boss.
As explained to me in good depth, it has to do with the microscopic porosity of the metal. Enabling the bristles to grab hold and cause damage. "I've personaly have never been able to reverse a properly fitting brush in the barrel" I am however guilty of exiting muzzle and drawing back thru.
Another NO NO!!
Also I was educated on quality of factory barrels, or lack there of. Only customs barrels in my future. But first I need to implement what I've learned and change my technique.
Thanks for the inlightning conversation forum boss, it was an eye opener to say the least.

 

[Jimmy James]

My rifle smith who holds a couple F class records (I'm sure have since been eclipsed) uses a brush and he uses Brux bbls. I use Brux bbls because he likes them and likes to provide them but I do not use a brush on my Brux bbls. I don't compete but routinely shoot bug holes. Shooter's Choice MC7 on the range and Wipe Out Patch Out at home on the bench and I follow their directions where it says let it soak minimum of 1 hour up to 24hrs. As to the OP, the dirtiest powder I use is Varget in 6BR. As to a carbon ring, I dont know. I occasionally take a gun to my rifle smith and we look at the bore. No sign of carbon rings.

 

[Texas10]

So your putting these in your chamber to see the throat and beyond?

Yes, and the muzzle too. I have one that will fit down a 22 cal barrel, although it's focal length is not quite short enough IMOP, and one that fits the chamber end that has good enough resolution to see carbon build up. I also use it by inserting a cleaning rod down the muzzle and using the reflection off the jag to illuminate the rifling as I slide it towards the camera. Looking down the muzzle, copper is easily visible.

 

[Paddyd]

Logic would tell me that residual carbon is the result from an incomplete burn of fuel. If you use too slow of a powder for your application (lightweight bullets and too short of a barrel) you'll get significantly more residual carbon than if you used a faster powder that provided a more complete burn. So in my opinion it is more the application of the proper burn rate than type or brand.

 

[JMayo]

We could discuss this for months and months .....
OH WE HAVE !
LMBO !

 

[338 dude]

I have found ,by using a borescope,that H335 and Varget do leave significant carbon fouling even with frequent cleaning using Patch-Out products every 15-20 rounds. I have used H322,AA 2015,VV 133,and LT-32 in my PPC's and .223's with very little carbon fouling. I don't know if any other powders are so prone. Cleaning this carbon out can be labor intensive. It's better to clean frequently to help prevent this.
I highly recommend a borescope even though they are expensive. I know it's hard to lay out $900,but
clean patches alone don't tell the story.
Good luck. Dan

You can get a teslong for 50 bucks and they work quite well

 

[Tommie]

And then after the solvents, brushes, stroking and scoping it’s time for fouling shots so the gun will shoot right. Gotta love it.

 

[Iowa Fox]

I'm no expert but here is what I can tell you for sure. 200 rounds, compressed load of H100v with 107s in the 243 gave me the worst almost clear and hard fouling I have ever seen in my life. Yes I had the barrel hot and yes I waited to long to clean it. It looked like it cleaned right up as usual when I finally got to it but I left it out over night in the stand with the bolt out. Next day just before I was ready to put it way I peeked down the bore it looked clean but something just wasn't right. I still wasn't concerned so I ran a wet patch of Butch's down the bore and let it sit over night. Looking the next day that clear glass like finish was dull with no doubt in my mind what I had.

Over the next week or so I tried no less than a half dozen bore cleaners I picked up along the way. Nothing was touching that stuff. I was down to one thing left, Wipe Out so I gave the barrel a shot and let it sit over night. In the morning I ran a patch thru and the ugliest brown tobacco juice looking stuff pushed out the muzzle ahead of the patch. I decided to soak it with Patch out then hit it with wipe out overnight. It still took me about a week of overnight soaks to get it clean. Moral of the story, it was a self inflicted leaning process for me. I'm gonna keep one bottle of Butches, one bottle of Shooters Choice, one Patch out, and one Wipe Out (the secret weapon). Rest of the stuff I'm giving away to get rid of it and chuckle to myself as I read some of the advertising claims on bore cleaners..