.17 Caliber Brass Bore Brush – Rifle Cleaning Brush

5-Pack .17 Caliber Brass Bore Brush

Out of stock

SKU: BR-0001-017-p5

5-Pack .17 Caliber Brass Bore Brush

Out of stock

SKU: BR-0001-017-p5

Packs

Available Options

.17

Out of stock

Know before you buy:

Shipping Policy Return & Refund Policy

⚠️ WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

The .17 caliber has the smallest bore of any common rifle - and that tiny 0.172" channel fills up with fouling fast. This .17 caliber brass bore brush is sized precisely for it, reaching where patches alone can't. Phosphor bronze bristles clear lead and carbon deposits without risk to your rifling.

Calibers like .17 HMR and .17 WSM are rimfire favorites for varmint and pest control, prized for flat trajectories and minimal recoil. But rimfire fouling is waxy and corrosive, and in a bore this small it builds up quickly. Skipping a bore cleaning session means noticeably tighter groups falling off sooner than with larger calibers.

This rifle cleaning brush works best with a quality bore solvent - apply, let it soak, then push the brush through in one direction. A few passes after each outing keeps your .17 shooting tight. Small bore, quick gun cleaning, big difference in accuracy.

Caliber:

.17 HMR

Product Type:

Bore Brush

Firearm Type:

Rifle

Use Case:

Bore Fouling Removal

Pack Size:

10-Pack, 20-Pack, 3-Pack, 5-Pack, Single

Bristle Material:

Phosphor Bronze

Core/Stem Material:

Twisted Wire (Brass)

Bore Diameter (in):

0.172

Thread Size:

5-40

Country of Origin:

Imported (China)

Brand:

GUNNIX

The .17 caliber bore brush uses 5-40 threads - a smaller thread than the 8-32 standard used by most rifle and pistol brushes. This matters when buying a cleaning rod or adapter. If your rod has 8-32 threads, you will need a 5-40 to 8-32 adapter to attach a .17 caliber brush.

The .17 caliber bore is only 0.172 inches - the smallest common rifle bore. That tiny diameter means any fouling takes up a larger percentage of the available space. Rimfire rounds like the .17 HMR leave lead and wax residue that can fill the shallow grooves quickly. Frequent brushing between sessions keeps accuracy from dropping off.

No. Phosphor bronze is softer than barrel steel regardless of caliber. In fact, the .17 caliber is where proper brushing matters most - the small bore is more sensitive to fouling buildup, and skipping the brush leads to accuracy problems faster than in larger calibers. Use a bronze brush with solvent, follow with patches, and your barrel stays clean.

Bronze for deep cleaning. The .17 bore accumulates lead and carbon fouling that nylon bristles struggle to dislodge. Some shooters use nylon for between-session passes with solvent, but when accuracy starts to fall off, a bronze brush is what brings the bore back to clean. Just replace the brush when bristles lose their stiffness.

You need a rod thin enough to pass through the .17 bore - standard rifle rods are too thick. Dedicated .17 caliber rods or flexible cleaning cables are the practical options. A one-piece coated rod protects the bore from contact damage. Make sure the rod tip has 5-40 threading, or carry an adapter to fit the .17 cal brush.