Description
Anyone who shoots a muzzleloader knows the job isn't done when the last shot goes downrange. Black powder and its substitutes leave behind corrosive fouling that eats at your bore if you let it sit, and these Thompson Center T17 patches are built to shut that process down fast. Each one is a 2.5" double-knapped cotton patch already saturated with T17 Bore Cleaner, so there's no bottle to fumble with and no measuring involved. You run one down the barrel, watch it come out ugly, follow with another, and keep going until they wipe clean.
What the T17 Formula Actually Does in Your Bore
The T17 cleaner these patches carry was made specifically for the residue modern muzzleloaders produce. It's formulated to clean and neutralize the corrosive effects of black powder and black powder substitutes like Triple Seven, Pyrodex and Blackhorn 209. Beyond cutting fouling, the formula tackles plastic and metal deposits and then leaves a micro-thin protective layer behind that helps hold off rust and corrosion between range trips or hunting seasons.
Why the Jar Beats Loose Patches and a Bottle
The 100 patches come packed in a resealable jar that keeps them moist and ready, whether they're sitting on your bench or riding in a pack. That matters more than it sounds. You get consistent, controlled cleaning without soaking dry patches yourself, and you can pull a couple for a quick field wipe-down between reloads to keep loading smoother. Sized at 2.5", they pair up nicely with .45 and .50 caliber bores on a standard jag and ramrod, and plenty of folks run them in .54 caliber rigs too.
If you shoot an inline like a T/C Omega or a traditional sidelock, these are a straightforward way to keep your barrel honest without hauling a full solvent setup into the woods.
Key Specifications
- Manufacturer: Thompson Center
- Manufacturer Part Number: 9026R
- UPC: 810180301633
- Patch Material: 100% Double-Knapped Cotton
- Patch Diameter: 2.5 inches
- Caliber Fit: .45 and .50 (also works with .54)
- Solvent: T17 Bore Cleaner (pre-saturated)
- Designed For: Black powder and substitutes (Triple Seven, Pyrodex, Blackhorn 209)
- Quantity: 100 Count
- Packaging: Resealable Jar
- Product Type: Cleaning
What’s Included
- Resealable jar of 100 pre-saturated T17 cotton cleaning patches (2.5" diameter)
Frequently Asked Questions
What calibers do the Thompson Center T17 patches fit?
The 2.5" patches are made for .45 and .50 caliber muzzleloaders and pair with a standard jag and ramrod. Plenty of shooters also run them successfully in .54 caliber bores. Fit depends a bit on your jag size, so match accordingly.
Do the T17 patches work on Triple Seven and Pyrodex fouling?
Yes. The T17 Bore Cleaner they're soaked in was formulated to clean and neutralize fouling from black powder substitutes including Triple Seven, Pyrodex and Blackhorn 209, as well as traditional black powder. It also helps break down plastic and metal deposits left behind after shooting.
Do I still need to oil the bore after using these patches?
The T17 formula leaves a thin protective film that helps guard against rust and corrosion during storage. For long-term storage or damp conditions, many folks still finish with a dedicated pre-oiled patch or a light coat of bore oil for extra insurance. For between-session cleaning, these get you covered.
How many patches does it take to clean a muzzleloader barrel?
It varies with how much you've shot, but a typical cleaning runs a few patches until they come out clean. Since each jar holds 100, you get plenty of sessions out of one container. Keep the lid sealed so the remaining patches stay moist.





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