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BROWNELLS HOME GUNSMITHING - Bore Cleaning

 

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John Scoutten – Bore Cleaning
Kit Available Online

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I’m going to show you a cleaning process with the utmost in accuracy in mind. We’re going to use a couple of unique products from the Brownell’s catalog.

 

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Before we get started, I want to give you a look inside the rifle using the Hawkeye Borescope Camera. Now, these are the lands and grooves of our rifling and the black that you see in the grooves, that’s fouling. It could either be carbon, lead, or copper. Either way, it’s affecting our accuracy and we need to get rid of it.

 

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First, the key tool in this cleaning process is the Sinclair Two Piece Chamber Guide. The larger piece fits into the rifle and will protect our chamber. The smaller piece is tighter. We want that around the cleaning rod before we add any patches. These two guides are going to work together to keep our cleaning rod perfectly straight down the bore.

 

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Now, the two critical elements to this process: JB Bore Compound, considered the gold standard in precision rifle cleaning, developed in the late 60s and early 70s by benchrest shooter Jim Brobst. And Kroil, a light penetrating oil, that’s going to work its way on, in, and behind that fouling we saw in our rifling.

 

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The first step in the process is to send a Kroil soaked patch down the bore. So I’ll start with a dry patch and wrap that around my Parker Hale style jag. Using the Sinclair Chamber Guide solvent port, I’ll add the Kroil to the patch, and that minimizes the mess. Now, bring forward the rod guide, and that keeps everything perfectly straight as we head down the bore.

 

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While the Kroil is working on our rifling, I’m going to show you a technique to use with the JB Compound. Now, there are many different ways to use this compound. The one I’m going to show you was developed by Thomas Speedy Gonzales, the Hall of Fame benchrest shooter. Take a healthy dose of the stuff and rub it on about the first third of your patch. Then fold that over and rub on some more. Once you get the patch good and covered, now you want to add even more of the compound around the outside. Next, you want to put the patch on the jag.

 

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Now, the beauty of this stuff, and making the fold, is you’re developing a ball of the JB Compound right at the end of the jag, and that is going to work its way into the rifling grooves and really clean up that fouling.

 

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On my first pass down the bore, I’m going to cover the muzzle with my finger, and slowly push the jag until it just passes the crown. Next, I’m going to mark my cleaning rod with this piece of tape. This is why I wanted to use the Parker Hale Style jag, because it’s going to allow me to scrub back-and-forth, inside the bore, 15 or 20 times.

 

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Next, we’ll send some TCE soaked patches down the bore till they come out clean. Finally, another pass with the Kroil, or your favorite gun oil.

 

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Now, let’s take a look through the Hawkeye Borescope Camera to see how we’ve done. Well, I would call that a drastic improvement. And now you know the secret to benchrest accuracy.
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More info on the Shooting USA JB Bore Cleaning Kit

More info on the Hawkeye Borescope Camera

More info on the Sinclair Two Piece Chamber Guide

 

 



 

 

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