Description
When it comes to keeping a handgun bore clean, having the right size patch on hand makes the whole job faster and less frustrating. These Birchwood Casey 2.25-inch square patches are cut for the 9mm through .45 caliber range, so one box covers most of the pistols in a typical safe. They're built from 100% cotton with a textured cross-weave, which means they grab onto carbon and fouling instead of just gliding over it. And with 500 to a pack, you won't be rationing patches partway through a cleaning session.
What Sets These Birchwood Casey Patches Apart
The cross-weave pattern is the real story here. That double-stitch texture gives the patch more bite for scrubbing out powder residue, copper, and lead, while still being soft enough to run down a bore without scratching. The cotton is highly absorbent too, so it holds more oil for a good even coat and soaks up more solvent when you hit a dirty barrel. Folks who use them regularly tend to point out that the textured surface pulls out fouling better than plain smooth patches.
Sizing and Fit for the 41166 Patches
At 2.25 inches square, these are a solid match for standard slotted patch loops and jags used with 9mm, .38, .40, 10mm, and .45 caliber pistols. Square patches like these give you flexibility since you can fold them to snug up a smaller bore or run them flat for the bigger stuff. They work with just about any cleaning kit you already own, whether you're at the bench or packing a range bag.
Why a 500-Count Box Makes Sense
Buying patches in bulk is one of those small moves that pays off. A single range trip can eat through a handful of patches per gun once you factor in solvent passes, dry passes, and a final oiled pass. Having 500 on standby means you're never tempted to reuse a dirty patch just to make the box last. Birchwood Casey has been making gun care gear since 1948, and these lint-free patches are a no-nonsense staple worth keeping stocked.
Key Specifications
- Manufacturer: Birchwood Casey
- Model: Cleaning Patches
- Manufacturer Part Number: BC-41166
- UPC: 029057411669
- Caliber/Gauge: 9mm-.45 Caliber (fits .38, .40, 10mm)
- Patch Size: 2.25" Square
- Shape: Square
- Material: 100% Cotton
- Weave: Durable Cross-Weave / Double Cross-Stitch
- Finish: Lint-Free
- Quantity: 500 Per Pack
- Product Type: Cleaning Patch
- Country of Origin: Made in USA
- Shipping Weight: 0.275 lbs
What’s Included
- 500 Birchwood Casey 2.25" square cotton cleaning patches (Item 41166)
Frequently Asked Questions
What calibers do these Birchwood Casey 41166 patches fit?
The 2.25-inch square size is designed to cover 9mm through .45 caliber pistol bores, which also includes .38, .40, and 10mm. Because they're square, you can fold them down to snug up a smaller bore or run them flat for the larger calibers. That range makes one box handy for a mixed collection of handguns.
Are these cleaning patches really lint-free?
Yes. The cross-weave cotton construction is made to resist shedding fibers, so you're not leaving fuzz behind in the bore or on the crown after your final pass. That matters most on the dry and oiled passes when you want a clean, residue-free finish.
How many patches will I go through per cleaning?
It depends on how dirty the gun is, but a single pistol cleaning usually eats several patches once you count solvent passes, scrubbing, dry passes, and a final oiled patch. That's why the 500-count box is a smart buy, since you won't be tempted to reuse a fouled patch just to stretch the pack.
Do these work with any cleaning kit?
They fit standard slotted patch loops and jags used in most pistol cleaning kits, so they'll pair with the gear you likely already have. The square shape gives you flexibility to size the patch to your bore rather than being locked into a pre-cut round. Just thread or wrap and run it through as usual.





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