He obviously has not read the instructions on the JB jar "Use sparingly".
Barrel Cleaning
- Thread starter Mike TackleBerry
- Start date
Well I know of a lot of top shooters that us JB after every 20 rounds and they keep kicking A$$ so that being said everyone has there own way of cleaning. I myself don't us it every time but when I see stuff in the bore I don't like the JB comes out along with so Flitz! My Heavy gun averaged 7.2 with a 94 score for ten matches at PA. so I think I done something right.
Joe Salt
Joe Salt
Not much at all if anything.
What makes it worse is that you act like you've done all the testing that he has done to prove his theory.
Dude guy. I spent 23 years at NAWC WD testing weapons from 5.56 through 20mm. His knowledge of why a barrel gets "rough" is astoundingly ridiculous.
I'm sure you did, Next, you're going to tell us you were a DEVGRU operator.
Maybe he's not using a bore guide so he can get a better clean at the end of the chamber in the throat/leade which is where he's concentrating the effort. See ~ 8:45 in vid.
I can relate to the point about carbon build up and barrel speed. After a clean my .308 barrel at 800 rounds speeds up an average of 6 fps every 10 round string until it hits about 30 rounds then stabilises.
I can relate to the point about carbon build up and barrel speed. After a clean my .308 barrel at 800 rounds speeds up an average of 6 fps every 10 round string until it hits about 30 rounds then stabilises.
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Evlshnngns
Silver $$ Contributor
HIGH PERFORMANCE
He is running 300NM in competition. It is literally torching itself to death. Ive read one account of a 300nm going south under 800 rounds. Maybe this technique is better suited toward the 28 nosler 300 rum crowd.
He is running 300NM in competition. It is literally torching itself to death. Ive read one account of a 300nm going south under 800 rounds. Maybe this technique is better suited toward the 28 nosler 300 rum crowd.
The testing, measurements (e.g., with gauge pins in the throat) and other underpinnings to this are detailed in his book "Volume III of Modern Advancements in Long Range Shooting", Chapter 8, Barrel Break-in & Lifecycle.
All three volumes are highly recommended reads.
PS: yes, in the video he should have used a bore guide. No clue why he didn't.
precisionrifleblog.com
All three volumes are highly recommended reads.
PS: yes, in the video he should have used a bore guide. No clue why he didn't.
Sneak Peek of Bryan Litz’s New Book: Volume III of Modern Advancements in Long Range Shooting
Bryan Litz and the team from Applied Ballistics have released another book packed with their latest...
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My buddy's 7 Rem mag barrel was toast in around 600 rounds, He was shooting Berger 190s at 3240 fps though.
D Coots
Silver $$ Contributor
I've used JB and as far as it being abrasive, it's right up there with lard.......
Arm gets tired after a few hundred strokes...Have you ever tried flitz? Works great and makes the job easier than jb.I've used JB and as far as it being abrasive, it's right up there with lard.......
D Coots
Silver $$ Contributor
Long time ago on the flitz. I shoot SR BR, still learning after 20+ years. Still using 2006 N133 powder in a 6PPC( I've heard they deliver on a pallet) I clean with wipe out patch out and a nylon brush. After a couple aggs I sometimes use Iosso on a patch. At the end of the day, I let her soak all night, dry out the next day, look inside...usually good to go. When I get home w/o p/o for a couple days...usually good to go.
That being said, the newer N133 is different and have heard other cleaning methods are needed.
Later
Dave
That being said, the newer N133 is different and have heard other cleaning methods are needed.
Later
Dave
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I have gone on high-round-count squirrel safaris for decades, always cleaning with good solvents and bronze brushes. After around 500-700 rounds I use the JB to get the carbon ring under control and take the copper and carbon out almost completely - something the solvents and brushes just don't seem to tackle nearly as well. I'd guess about 20-40 strokes per barrel on barrels that still shoot very accurately, given some I'm still using have well over 6,000 or 7,000 rounds on them. Mind you, these aren't shot in bench rest competitions where the most extreme accuracy is demanded, but if JB was bad on barrels, these suckers would not shoot. I do use it in my target barrels, though much more sparingly - mostly for that carbon ring. I love that stuff. I do try to keep 90% of the strokes limited to the throat and the first 6" to 8" of the bore. That would equate to approximately 300 strokes over the time it took my "high mileage" barrels to get to the round count where they are at. That would be the same as about 5 strokes per every 100 rounds run through them. If it is bad - it can't be THAT bad....
Looking good!
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