The Proshot Large Cal. Rifle Bore Mop .35 - .375 Cal. is a dedicated firearm maintenance tool designed for quick bore cleaning, applying solvents, absorbing residual chemical fouling, and spreading a uniform protective coat of lubricant inside large-bore rifle barrels. Engineered with a dense 100% cotton swab head built around a non-abrasive solid brass core, it creates a foaming action when applying gun oils to ensure complete coverage across the lands, grooves, and chamber without risking steel-on-steel contact or crown damage. It weighs under 25 grams and connects to standard rifle cleaning rods via an American standard #8/32 male thread.

Key Features

• Calibre-Specific Cotton Head: Built with a 100% cotton weave sized precisely for .35 in (8.89 mm) to .375 in (9.53 mm) internal barrel diameters to deliver 360-degree surface contact.
• Protective Solid Brass Core: Features a durable brass shank and core that prevents mechanical rifling damage and protects the barrel crown during repeated insertion and extraction.
• Standard Rod Threading: Fitted with an industry-standard #8/32 male thread for direct compatibility with standard American rifle cleaning rods.
• Chemical & Moisture Absorption: Absorbs dissolved copper and powder fouling after initial scrubbing and removes moisture from field-exposed barrels prior to storage.

Specifications

• Calibre Compatibility: .35 Caliber to .375 Caliber (8.89 mm to 9.53 mm internal bore diameter)
• Thread Pattern: Standard American #8/32 male thread
• Swab Material: 100% cotton
• Core Material: Solid brass
• Total Weight: Under 25 grams (0.02–0.05 lbs packaged)
• Intended Role: Solvent application, moisture removal, and uniform oil distribution

Who is the Proshot Large Cal. Rifle Bore Mop .35 - .375 Cal. for?

• Big-game hunters — provides complete 360-degree surface coverage for uniform bore oiling and moisture extraction across .375 in (9.53 mm) internal bore diameters on .375 H&H Magnum rifles used for feral buffalo and sambar deer.
• Primary producers and sports shooters — threads directly to standard #8/32 cleaning rods to apply solvents and absorb chemical residue throughout .35 in (8.89 mm) bore platforms like .35 Whelen and 9.3mm hunting rifles.

Less suitable for: Barrels below .35 in (8.89 mm) where the oversized cotton head will bind and risk bending rods, requiring smaller calibre-specific bore mops, or bores above .375 in (9.53 mm) that fail to make full contact, requiring larger .40 to .45 calibre mops or dedicated shotgun mops.