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Anyone who runs a copper-removing solvent knows the frustration of pulling a blue patch out of a barrel that's already clean. That blue isn't always fouling from your bore. Traditional brass jags are more than 60% copper by composition, and aggressive cleaners eat away at them just like they attack fouling, painting your patch blue when there's nothing left in the bore to remove. The .20 Caliber Proof Positive Rifle Jag by Bore Tech puts an end to that guesswork.
This jag is machined from a proprietary brass-free alloy that's about as soft as brass but carries serious tensile strength, so it resists bending and snapping even when you're driving a tight patch. It also gets a secondary treatment that seals the surface and keeps harsh chemicals from reacting with it, which is what keeps your patches reading true. When the blue stops showing up, you can trust that your bore is genuinely copper free instead of chasing a color that was never really there.
The business end features a dual set of contact rings built for real cleaning performance. The first ring in each set is rounded so the jag centers itself in the bore without risking the rifling, while the squared rings behind it grab the patch and hold it in place. The relief space between the two sets doubles as a small solvent reservoir, carrying clean solvent deeper into the barrel. Length is dialed in specifically for .20 caliber and the correct patch size, which keeps patches from bunching up or jamming on the tip of your rod.
This one uses the standard 8-32 male thread, so it threads onto most common cleaning rods and adapters. It really shines alongside Bore Tech's Proof Positive Bore Stix rods thanks to the smooth, edge-free transition at the rear of the jag that protects your crown on the pull stroke. If you've committed to a brass-free cleaning routine, dropping in a matching jag is the piece that makes the whole system honest about what's happening in your bore.
Brass jags are over 60% copper, so copper-removing solvents react with the jag itself and turn your patch blue even when the bore is clean. The Proof Positive jag is made from a brass-free alloy with a sealed surface, so nothing on the jag reacts with your cleaner. When the blue stops, you know the copper is genuinely out of your barrel.
The .20 caliber Proof Positive jag uses the standard 8-32 male thread found on most rifle cleaning rods and adapters. It's designed to pair especially well with Bore Tech's Proof Positive Bore Stix rods for a smooth, crown-safe transition on the pull stroke.
Bore Tech sizes each jag length to the caliber and the correct patch size, so stick with a patch made for .20 caliber for the best fit. Using the matched patch keeps everything from bunching or jamming on the tip. If a patch feels overly tight, Bore Tech recommends a technique they call side spiking rather than dropping to an undersized jag.
Yes. The proprietary alloy is about as soft as brass so it stays barrel safe, but it carries much higher tensile strength to resist bending and snapping under the force of a tight patch. The secondary treatment also protects it against harsh cleaning chemicals for long-term durability.
| UPC | 667739980289 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | BTAJ-20-00 |
| Caliber/Gauge | .20 Caliber |
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