J-B bore paste



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Offline grampaj

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J-B bore paste
« on: March 24, 2014, 08:17:02 PM »
I've read that you don't use bore paste on a airgun. I decided to try it on my marauder an this is the group I got at 30 yards with cphp 14.3. Before I started the barrel looked rough inside an my group was about the size of a quarter with some flyers.
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Offline rsterne

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Re: J-B bore paste
« Reply #1 on: March 24, 2014, 08:17:56 PM »
I use JB Bore Paste on every new barrel the first time I have it off the gun, followed by Bore Brite....

Bob
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Offline JonnyReb

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Re: J-B bore paste
« Reply #2 on: March 24, 2014, 08:21:12 PM »
 I too, use it on every airgun i buy. It has never hurt one, but has helped MANY, removing rough spots and allowing use of pellets they once hated. I consider JB paste to be a secret weapon  . ;D
« Last Edit: March 24, 2014, 08:23:25 PM by JonnyReb »
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Offline SeanMP

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Re: J-B bore paste
« Reply #3 on: March 24, 2014, 08:50:06 PM »
X3

Count me in here too. Every barrel that leaves the shop gets a minimum of a polishing with JB Bore followed by JB Brite. Be it PB or AG
  • Land O Lakes Ontario
"NO DELIVERY PROMISED. TAKE YOUR WORK WHEN DONE OR TAKE IT ELSEWHERE.
IF YOU MUST KNOW WHEN I WILL BE THROUGH WITH YOUR WORK THE ANSWER IS NOW. TAKE YOUR WORK AWAY. I DON'T WANT IT. I HAVE NO WAY OF KNOWING WHEN I WILL BE THROUGH. I WORK ELEVEN HOURS A DAY. DAILY INTERRUPTIONS AVERAGE ONE AND ONE-HALF HOURS.
 THERE IS BUT ONE OF ME. I'M HUMAN AND I'M TIRED. I REFUSE TO LONGER BE WORRIED BY PROMISES THAT CIRCUMSTANCES DO NOT ALLOW ME TO KEEP." Harry Pope

Offline doninva

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Re: J-B bore paste
« Reply #4 on: March 24, 2014, 09:50:17 PM »
Have been doing the J-B thing on every gun I have owned in the last 30 years except for a Tikka .243 I have. It has the slickest barrel I have EVER seen on a gun and shoots everything I put down the barrel well. Just did my AA S200 even though it was shooting good. Don
  • Boones Mill, VA, USA

Greg_E

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Re: J-B bore paste
« Reply #5 on: March 24, 2014, 10:26:12 PM »
Anyone know where the 2 ounce size is in stock? Not having much luck with Google finding stores.

Offline SeanMP

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Re: J-B bore paste
« Reply #6 on: March 24, 2014, 10:30:04 PM »
Brownells will have it if your buying online. Always check Amazon beforehand
  • Land O Lakes Ontario
"NO DELIVERY PROMISED. TAKE YOUR WORK WHEN DONE OR TAKE IT ELSEWHERE.
IF YOU MUST KNOW WHEN I WILL BE THROUGH WITH YOUR WORK THE ANSWER IS NOW. TAKE YOUR WORK AWAY. I DON'T WANT IT. I HAVE NO WAY OF KNOWING WHEN I WILL BE THROUGH. I WORK ELEVEN HOURS A DAY. DAILY INTERRUPTIONS AVERAGE ONE AND ONE-HALF HOURS.
 THERE IS BUT ONE OF ME. I'M HUMAN AND I'M TIRED. I REFUSE TO LONGER BE WORRIED BY PROMISES THAT CIRCUMSTANCES DO NOT ALLOW ME TO KEEP." Harry Pope

Offline cooter472

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Re: J-B bore paste
« Reply #7 on: March 24, 2014, 10:44:09 PM »
Brownells will have it if your buying online. Always check Amazon beforehand
X1 on Brownells and the cleaning pellets and rod adapter, as for rod don't skimp and make sure it has two bearing in handle so the cleaning pellet can follow the twist
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Offline cooter472

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Re: J-B bore paste
« Reply #8 on: March 24, 2014, 10:48:46 PM »
Oh ;D, theres a link on here somewhere for lapping with the felt pellets and some type of oil. Don't know where its at but I have it printed out at work. Maybe one of our super members has this link buried in the brain lol
  • Hanover, In
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Greg_E

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Re: J-B bore paste
« Reply #9 on: March 24, 2014, 11:13:33 PM »
Brownell's was out of stock, how long will the little 3/4 ounce container last, they had that. The barrel on my xs60c is terribly filthy. Need to get some felt pellets too, and check the cleaning rod.

Offline sr1sws

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Re: J-B bore paste
« Reply #10 on: March 24, 2014, 11:21:35 PM »
Anyone care to post the "right" way to JB a barrel - equipment and technique?  For my specific instance, I have a .177 Discovery.

Thanks in advance for the education!

Steve
  • Tampa, FL
.177 Crosman 147 ca. 1963 - original owner
.177 Remington Vantage NP - sold
.177 Benjamin Trail NP pistol - sold
.177 Benjamin Discovery + TKO, Hawke Sport HD 3-9x40mm
.177 Crosman 2300kt + TKO, Walther MRS Reflex
.177 Benjamin Marauder/SynRod Gen II - Regulated, WAR TSS, UTG SWAT 30mm 3-12x44
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Offline nervoustrigger

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Re: J-B bore paste
« Reply #11 on: March 25, 2014, 12:48:09 AM »
I've been wanting to try lapping the bore of some of my rifles.  Is a mop a good way to apply the lapping compound?  I don't quite follow how I would go about using cleaning pellets to do this.  I've only heard of using them for fire lapping.

Also, I understand the importance of using a freely-spinning cleaning rod.  Any recommendations that don't break the bank?  A Tipton carbon fiber rod says it has twin bearings like cooter472 suggested but before I drop over $30 on a cleaning rod, I figured I'd better ask if there are less costly options out there that would work just as well.

Offline rkr

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Re: J-B bore paste
« Reply #12 on: March 25, 2014, 02:43:41 AM »
Anyone know what grit number that JB paste has? I can't get it locally so I've been looking for alternatives.
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Offline grampaj

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Re: J-B bore paste
« Reply #13 on: March 25, 2014, 08:17:46 AM »
I completely remove the barrel an the o ring. Tried the vfg pellets but had better luck with a bronze brush wrapped with a patch. Made several passes until barrel started to have a shine to it. Then I used goo be gone then some dry patches.
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Offline grampaj

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Re: J-B bore paste
« Reply #14 on: March 25, 2014, 08:23:22 AM »
I use JB Bore Paste on every new barrel the first time I have it off the gun, followed by Bore Brite....

Bob
Bob, does the bore brite make a difference?
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Offline sr1sws

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Re: J-B bore paste
« Reply #15 on: March 25, 2014, 08:33:30 AM »
I've been wanting to try lapping the bore of some of my rifles.  Is a mop a good way to apply the lapping compound?  I don't quite follow how I would go about using cleaning pellets to do this.  I've only heard of using them for fire lapping.

Also, I understand the importance of using a freely-spinning cleaning rod.  Any recommendations that don't break the bank?  A Tipton carbon fiber rod says it has twin bearings like cooter472 suggested but before I drop over $30 on a cleaning rod, I figured I'd better ask if there are less costly options out there that would work just as well.

+1!!! :)
  • Tampa, FL
.177 Crosman 147 ca. 1963 - original owner
.177 Remington Vantage NP - sold
.177 Benjamin Trail NP pistol - sold
.177 Benjamin Discovery + TKO, Hawke Sport HD 3-9x40mm
.177 Crosman 2300kt + TKO, Walther MRS Reflex
.177 Benjamin Marauder/SynRod Gen II - Regulated, WAR TSS, UTG SWAT 30mm 3-12x44
.177 QB79 + Ninja Pro SHP V2 Regulated Bottle, UTG SWAT 30mm 3-12x44, DIY Half-Shroud

Offline sr1sws

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Re: J-B bore paste
« Reply #16 on: March 25, 2014, 08:37:25 AM »
Anyone know what grit number that JB paste has? I can't get it locally so I've been looking for alternatives.

Maybe Mothers brand metal polish? - look in automotive.  I used that for my $.25 Glock trigger job.  As far at that goes, I've used it to polish plastic watch crystals - so it's fairly fine.

Steve
  • Tampa, FL
.177 Crosman 147 ca. 1963 - original owner
.177 Remington Vantage NP - sold
.177 Benjamin Trail NP pistol - sold
.177 Benjamin Discovery + TKO, Hawke Sport HD 3-9x40mm
.177 Crosman 2300kt + TKO, Walther MRS Reflex
.177 Benjamin Marauder/SynRod Gen II - Regulated, WAR TSS, UTG SWAT 30mm 3-12x44
.177 QB79 + Ninja Pro SHP V2 Regulated Bottle, UTG SWAT 30mm 3-12x44, DIY Half-Shroud

Offline SeanMP

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Re: J-B bore paste
« Reply #17 on: March 25, 2014, 09:18:43 AM »
Okay so the deal with JB is it's a friable abrasive. This is critical. What happens is pieces of abrasive imbed themselves into the steel of the bore. The friable abrasive will crumble. All the alternatives do not crumble. If you want to make your own I would suggest rotten stone and oil as being a viable alternative.

As far how long a 3/4 oz will last. I have a 2 oz jar. I sent a 1/2 oz to bob. I have been using the remainder for two years and I'm a shop.

$30 for a rod handle is reasonable. I wouldn't be inclined to prefer carbon fiber though. Ideally you want a rod which is harder than the bore steel. The odd thing about lapping is the soft material wears the hard material. This is why we use lead as a lapping slug. I make my own handles but only because I have the ability. What you absolutely don't want is a rod that is soft enough for the abrasive to embed into.

Cleaning and polishing a bore with JB is very simple ( your not lapping, this is a more involved process)
Run an oiled patch through the bore to remove any loose grime
Smear a tight fitting patch with JB Bore and add a few drops of oil. Starting from the breech end if at all possible run the patch full length once. Do not let the patch leave the muzzle. Set up a stop in front of the muzzle. (I position the barrel almost against the wall by securing it in a rotating vise)
After one full length pass go in 1" and out, 2 inches and out. 3 inches and out proceed like this until you have progressed all the way to the muzzle. Your patch will be black and ragged. Coat a new patch with JB bore and repeat.
For a polish job I'm happy with 100-200 strokes. A good sign is the patches won't be torn up once the bore is smooth.
When your happy proceed to clean the bore with fresh patches and oil. Do NOT use solvents of any kind. The last thing you want is to remove the oils from the pores of the metal. This promotes leading. You will probably notice a big difference in the feel of the cleaning patches going down the bore
Once your cleaned up proceed to Bore Brite if you choose to. This puts on a high polish that will make a huge difference in future leading and clean up. Use full strokes to polish but again do not let the patch exit the crown.

After a few hundred shots use Bore Brite to clean and polish any leading. Repeat with bore Brite as often as you like. A well seasoned bore that is not stripped of its oils or scratched with a bronze brush will eventually become almost impervious to leading.

177 guys should substitute "patch" for VFG cleaning pellets. I do not buy these from Brownells. I prefer http://stores.ebay.ca/Olympic-Marksman-Equipment/CLEANING-PRODUCTS-/_i.html?_fsub=4005340016&_sid=53339476&_trksid=p4634.c0.m322
« Last Edit: March 25, 2014, 09:30:02 AM by SeanMP »
  • Land O Lakes Ontario
"NO DELIVERY PROMISED. TAKE YOUR WORK WHEN DONE OR TAKE IT ELSEWHERE.
IF YOU MUST KNOW WHEN I WILL BE THROUGH WITH YOUR WORK THE ANSWER IS NOW. TAKE YOUR WORK AWAY. I DON'T WANT IT. I HAVE NO WAY OF KNOWING WHEN I WILL BE THROUGH. I WORK ELEVEN HOURS A DAY. DAILY INTERRUPTIONS AVERAGE ONE AND ONE-HALF HOURS.
 THERE IS BUT ONE OF ME. I'M HUMAN AND I'M TIRED. I REFUSE TO LONGER BE WORRIED BY PROMISES THAT CIRCUMSTANCES DO NOT ALLOW ME TO KEEP." Harry Pope

Offline grampaj

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Re: J-B bore paste
« Reply #18 on: March 25, 2014, 09:32:48 AM »
14 shots last 4 wind picked up an I was low on air.
  • Buckhannon, WV

Offline sr1sws

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Re: J-B bore paste
« Reply #19 on: March 25, 2014, 01:00:52 PM »
Thanks Gents!
  • Tampa, FL
.177 Crosman 147 ca. 1963 - original owner
.177 Remington Vantage NP - sold
.177 Benjamin Trail NP pistol - sold
.177 Benjamin Discovery + TKO, Hawke Sport HD 3-9x40mm
.177 Crosman 2300kt + TKO, Walther MRS Reflex
.177 Benjamin Marauder/SynRod Gen II - Regulated, WAR TSS, UTG SWAT 30mm 3-12x44
.177 QB79 + Ninja Pro SHP V2 Regulated Bottle, UTG SWAT 30mm 3-12x44, DIY Half-Shroud

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