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Bore Tech

PROOF-POSITIVE PATCH JAG, .338 CAL

PROOF-POSITIVE PATCH JAG, .338 CAL

SKU: BTAJ-338-00

Bore Tech’s innovative Proof-Positive Rifle Patch Jags eliminate the annoying false indication of copper fouling that is common with all traditional brass jags when using copper removing cleaners. 

All Proof-Positive Rifle Patch Jags feature a proprietary alloy and secondary treatment process, making them 100% brass free and 100% barrel safe. This alloy is as soft as brass but boasts an exceptional tensile strength to prevent bending and snapping under the force of a tight patch.

Traditional brass patch jags are over 60% copper in their composition. When using effective copper removing cleaners this results in a blue copper fouling color on your patches when no copper is present in the bore. By eliminating brass accessories, shooters can effectively determine when a rifle bore is truly copper free and reduce wasted patches, chemical,s and time.

TRADITIONAL BRASS PRODUCTS                                                       PROOF-POSITIVE PRODUCTS

rifle patch jag                             patch jag for rifles

Featuring a dual set of 4 contact rings* for added patch contact and cleaning, the Proof-Positive Rifle Patch Jags are precision machined to strict tolerances in order to work flawlessly and provide true, concentric pressure on the barrel surface. The first ring of each set is rounded in order to allow the jag to center itself in the chamber/bore and alleviates the possibility of damage. The three subsequent rings of each set have a squared face that grabs the patch keeping it in place. In addition, the relief space between the dual set of rings acts as an extra solvent reservoir by retaining clean/unused solvent and dispensing it before the second set of rings passes. Each rifle jag length is specifically determined based on the caliber and proper patch size necessary for cleaning. This prevents patches from bunching and jamming on the tip of the cleaning rod.

Each Proof-Positive Rifle Patch Jag features a reverse taper at the rear of the jag that provides a completely smooth, edge-free transition between the jag and rod when used with our Proof-Positive Bore Stix cleaning rods. The reverse taper prevents damage to the firearm’s crown by centering the jag and lifting the cleaning rod off the bottom of the barrel when pulling the rod back into the bore.

Finally, an answer to your question, “Is my barrel clean”?
Yes, it is PROOF-POSTIVE clean!

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Bore Tech Information

Proof Positive Benefits?

Bore Tech’s Proof-Positive feature is a major innovation in firearm cleaning, designed to eliminate false positive indications of copper fouling. Traditional cleaning jags and loops are typically made from brass, which contains copper. When using ammonia-based copper solvents, these brass components can react chemically, producing a blue or green color in the solvent. This color change often misleads shooters into believing there is still copper fouling in the bore when, in reality, the reaction is coming from the jag itself. Bore Tech’s Proof-Positive jags and loops are made from a proprietary, brass-free alloy that eliminates this problem. This means any color change in the solvent is a true indication of copper fouling in the bore, allowing for more accurate and reliable cleaning.

The Proof-Positive feature is particularly beneficial for shooters who demand precise barrel maintenance, such as competitive marksmen, hunters, and gunsmiths. By removing the interference caused by brass jags, Bore Tech ensures that users don’t waste time and solvent chasing false copper indications. Additionally, Proof-Positive jags and loops are precision-machined for a perfect patch fit, ensuring thorough bore contact and more effective cleaning. This leads to less solvent waste, reduced cleaning time, and a properly maintained barrel, which ultimately enhances firearm accuracy and longevity. For anyone serious about firearm care, Proof-Positive technology is a game-changer, providing a smarter and more efficient cleaning process.

Which Rod Size

When choosing a Bore Tech cleaning rod for your rifle, you need to consider the barrel length and action type to ensure you get the right rod length. A good rule of thumb is to select a rod that is at least 6-8 inches longer than your rifle's barrel to accommodate the action and allow for full stroke cleaning. For bolt-action rifles, measure from the chamber to the muzzle and add extra length for comfortable use. For AR-style rifles, you may need an even longer rod due to the upper receiver's design. Bore Tech rods typically come in lengths ranging from 36 inches to 50 inches, so selecting the right one depends on your rifle’s specifications.

You can find our Bore Tech Rods here

Cleaning Fluids

All of Bore Tech's cleaning fluids are amonia free and bore safe - see the full range here

Patches