JB Bore Bright ??
Just picked up a jar of JB bore bright as I am always in the quest to
find barrel cleaning products that can ease barrel cleaning and improve
the accuracy of a barrel
So I look at the directions and it states not to get the paste in the chamber
as this can enlarge it and lead to problems
Adds say it's perfectly safe for all barrels
Has anyone used or has info on this product ??
JB Bore Paste is an excellant product. It is a aggressive cleaner and you need to get all of it out of the bore prior to firing. You can overuse is and it will polish the bore of a barrel to much which will cause galling of a bullet jacket.
JB Bore Bright
Great product; use it judiciously.
If you use a good bore guide that fits into the chamber like the Sinclair O-ring guides or similar, and a little care it'd be pretty hard to get anything in the chamber. With a little thought it could be done I suppose, but a person would have to work at it.
Kroil and JB paste is my primary cleaning materials.
JB Bore Brite, reddish color is more aggressive than JB Bore Paste, gray. Both seem to be a special clay base material. They will cut copper but not hard steel.
I have used both to clean and polish barrel chambers. Works.
The important thing is to remove all the paste and residue before you shoot next time.
I use Kroil for this.
My understanding is that JB Paste is much finer that the finest compound used to hand lap barrels so it would take an awful lot of work and dedication to hurt a barrel with it.
My understanding is that JB Bore Paste is made from barley, the silica in the barley providing the abrasive. From the color and description of the product I'd guess that Bore Bright contain jeweler's rouge which is red iron oxide and is used to polish metals and other materials.
"So I look at the directions and it states not to get the paste in the chamber
as this can enlarge it and lead to problems "
if it can enlarge a chamber, it can enlarge a bore. make your own decision.
Paste in chamber
Originally Posted by davejones
If you use one of the bore guides with an O-ring you won't have to worry about this. As with any paste cleaner, you want to be absolutely certain you remove all traces with solvent. It's safe to use under normal conditions but you don't want any in your bore or chamber when you go to fire a live round.
I think the biggest concern of getting it in the chamber is not getting it all out before firing. That could cause a problem...
... why not contact the manufacturer and ask them about the myth surrounding JB products as an abrasive on steel? ... that way you would kind of get the oats before they pass through the horse...
i've used JB bore Paste for over 20 years without a problem. i've never used JB Bore Bright - they are two different products.
miele, what exactly do the instructions say regarding enlarging the chamber???
Have not been around to answer questions but I believe there is some
confusion regarding JB Bore Bright- Looks like some people think this is
JB Bore past but it is not
JB Bore Bright caution" do not polish chamber walls,a too -slick chamber
will increase bolt thrust against the bolt and can damage the gun"
It is called "ultra fine bore polishing compound" which will finish the job
other conventional bore cleaners leaves.Also used to polish the throat
of barrels to enhance barrel life.Micro-polishes lands and grooves too
reduce fouling and you shoot longer between cleaning and makes
cleaning easier etc
Wow- Sounds like a Billy Mays comercial for oxyclean or something.
I am a little skeptical to use this all the time but have used it once in
a couple of barrels and indeed the bores feel much smoother
You got it.
Originally Posted by miele
I like this stuff better I believe.
Slightly off track.
Conventional wisdom states a highly polished chamber will not allow the brass to grip the chamber walls forcing the bolt to accept all the rearward thrust.
Just how much energy is used in stretching the brass. Seems to me the bolt is gonna get hit with the same energy either way.
If you read Parker Ackley, you'll find that he was getting about zero back thrust onto the action in an experiment where he was loading 30/30 AI in a Winchester 94. That is thought to equate to the capability of holding maybe 40000 psi pressure with that case. I recommend you read this article in his Handloads for Shooters & Reloaders books to get a handle on just how critical the condition of the chamber can be to us.
Bolt thrust is way less than you think, compared to the chamber pressure, depending on the quality of the brass you use. That's why you'll find old British proofs for 20 tons peak pressure stamped on actions. They used to rate action pressure according to the back thrust on the bolts. Of course, they rated barrels differently - some sort of hoop test, I seem to recall.