What specific cartridge cases are compatible with the Hornady #3 Cam Lock Case Trimmer Pilot (Model 390945)?

This pilot is precisely machined for .243 in / 6mm caliber cases, making it ideal for popular handloading rounds such as .243 Winchester, 6mm Creedmoor, 6mm BR, 6mm Remington, and 6mm ARC. It is strictly limited to this neck diameter and will not fit smaller bores like .224 or larger calibers such as 6.5mm and .308.

Does this trimmer pilot fit into competing brand case trimmers like Forster or Lyman?

No, the 390945 pilot is engineered specifically for the Hornady Cam-Lock Case Trimmer and legacy Hornady manual case trimmers. It features a proprietary shank design and will not interchange with other brands without custom adapters.

Are there any Australian electrical compliance or SAA/RCM certifications required for this tool?

No, the Hornady Cam Lock Case Trimmer Pilot is a 100 percent mechanical, non-electric tool component crafted from solid steel. Because it requires no electrical power, 240V ratings, SAA, or RCM regulatory certification, it is completely unregulated under Australian firearms and electrical safety legislation.

How do I ensure the pilot maintains its precision during long-term reloading sessions on the bench?

Constructed from durable, precision tool steel, the #3 pilot resists abrasive wear from brass case necks during high-volume medium-batch trimming. To protect your investment in outback or humid workshop environments, pair it with a quality rust preventative or store it alongside the Hornady Canister Dehumidifier to keep your reloading bench moisture-free.

6mm Case Trimmer Pilot - Hornady 390945

The Hornady Cam-Lock Case Trimmer Pilot #3 (.243 / 6mm) is a precision-machined solid steel reloading component designed for use with the Hornady Cam-Lock Case Trimmer (Item #050140) and legacy Hornady manual case trimmers. It inserts directly into the cartridge case neck to center and stabilize the brass against the trimmer cutter head, ensuring square, flat, and uniform case mouth cuts across repeated trimming cycles. Built for mechanical bench use, this non-powered tool features a chamfered entry for smooth neck insertion and an interchangeable press-fit shank that allows quick calibre changes.

Key Features

Calibre-Specific Alignment: Sized specifically for .243 in / 6mm internal neck diameters to eliminate lateral play and prevent uneven trimming.
Solid Steel Construction: Precision-machined from durable tool steel to withstand abrasive brass friction without dimensional wear.
Chamfered Pilot Head: Tapered entry profile allows quick, smooth case insertion without binding or damaging delicate case mouths.
Friction-Fit Shank: Fits directly into Hornady manual trimmer cutter heads for straightforward installation and calibre changeovers.
Non-Powered Operation: Purely mechanical handloading accessory requiring no electrical supply or regulatory certifications.

Product Specifications

Brand: Hornady
Model / MPN: 390945
Pilot Size: #3 Pilot
Calibre Compatibility: .243 in / 6mm
Material: Precision-machined solid steel
Trimmer Compatibility: Hornady Cam-Lock Case Trimmer (#050140) and legacy Hornady manual trimmers
Packaged Dimensions: 3.75 × 2.0 × 0.75 in
Weight: Approximately 0.017 to 0.05 lb (7.7 to 23 g)

Who is the Hornady Cam-Lock Case Trimmer Pilot #3 for?

Precision Target Shooters — Provides exact case neck centering for .243 in / 6mm caliber cases like .243 Winchester and 6mm Creedmoor, ensuring flat, uniform case lengths across match-grade handloads using a Hornady Cam-Lock Case Trimmer.
Hunters — Delivers consistent brass trimming squareness for .243 in / 6mm caliber hunting cartridges such as 6mm ARC and 6mm Remington during medium-batch ammunition preparation.

Less suitable for: Handloaders processing case necks below .243 in (such as .224 or .204 cal) or above 6mm (such as 6.5mm, 7mm, or .308), who require calibre-specific sub-calibre or large-diameter case trimmer pilots, as well as users of non-Hornady trimmer assemblies requiring dedicated manufacturer-specific trimmer pilots or adapters.

SKU	HN102879LP
Model #	390945
Brand	Hornady
Shipping Weight	0.1000kg

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Hornady 390945 Cam Lock Case Trimmer Pilot 243 Caliber Steel

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