Lee Precision Case Length Gauge & Shell Holder — 6mm Creedmoor (91340 | UPC 734307913403)
Get repeatable case lengths and fast, consistent trimming for your favorite 6mm rifle. The Lee Precision Gauge Holder for 6mm Creedmoor (91340)—commonly called the Case Length Gauge & Shell Holder—pairs with the Lee Cutter/Lock Stud or the Lee Deluxe Quick Trim to produce precisely trimmed brass every time. By using a caliber-specific pilot pin and a fixed-length gauge rod, this set automatically indexes off the shell holder and case head to stop right at the SAAMI-correct trim-to length for 6mm Creedmoor, eliminating guesswork and dial fiddling.
Why 6mm Creedmoor Reloaders Choose Lee’s Gauge & Holder
Fixed Trim Length = Consistency: The gauge is pre-set for 6mm Creedmoor trim-to length, delivering uniform case mouths that enhance neck tension and accuracy.
Faster Workflow: Combine with a Lee Cutter & Lock Stud (or Deluxe Quick Trim/Power Quick Trim) to quickly bring mixed-lot brass to spec with minimal setup.
Square, Burr-Free Mouths: Consistent trim translates into clean chamfer/deburr work, improved bullet seating, and lower runout.
Affordable, Caliber-Specific Precision: Add caliber gauge/holder sets for each chambering without buying a new trimmer every time.
Simple, Durable Design: Hardened steel components stand up to high-volume trimming sessions season after season.
What’s Included
6mm Creedmoor Case Length Gauge (pilot + stop rod, caliber-specific)
Lee Shell Holder (mates with the gauge and your trimmer system)
Note: Trimming hardware (e.g., Lee Cutter & Lock Stud, Deluxe Quick Trim, or Power Quick Trim) sold separately.
Compatible Lee Trimming Systems
Lee Cutter & Lock Stud (hand or drill)
Lee Deluxe Quick Trim (press-mounted)
Lee Power Quick Trim (press-mounted, powered)
This 6mm Creedmoor gauge/holder serves as the caliber-specific interface for all three systems.
Step-by-Step: Trimming 6mm Creedmoor Brass (Lee Cutter & Lock Stud)
Size & Lube: Size your cases first so necks are consistent.
Mount Shell Holder: Thread the Lock Stud into the Lee Shell Holder; insert the case and tighten.
Insert Gauge: Thread the 6mm Creedmoor gauge into the Lee Cutter; insert pilot into the case mouth.
Trim: Rotate by hand (or in a low-speed drill) until the stop rod bottoms—you’re at trim length.
Finish: Chamfer/deburr, wipe clean, and inspect length with calipers. Repeat for the batch.
With Deluxe/Power Quick Trim, install the press die body and run the case—the gauge sets the stop for you.
Benefits for 6mm Creedmoor Precision Loads
Uniform Neck Tension: Same case length = same amount of flare/chamfer = repeatable bullet grip for low ES/SD.
Better Seating & Concentricity: Square mouths guide bullets straighter, helping reduce TIR (runout).
Consistent Crimp (If Used): Identical lengths mean uniform crimp pressure across every round.
Confidence at Distance: More consistent ammo yields tighter vertical and predictable DOPE from 100 to 1,000+ yards.
Features & Specifications (At a Glance)
Product: Lee Precision Case Length Gauge & Shell Holder
Caliber: 6mm Creedmoor
Part Number: 91340
UPC: 734307913403
Material: Hardened steel gauge pin/rod and shell holder
Use With: Lee Cutter & Lock Stud, Deluxe Quick Trim, or Power Quick Trim (sold separately)
Function: Caliber-specific trim-to length control with built-in pilot guidance
Skill Level: Beginner-friendly; excellent for high-volume match or hunting brass prep
Pro Tips for Best Results
Size First: Trim after sizing for true length.
Anneal on Schedule: Uniform neck hardness supports consistent trimming feel and neck tension.
Measure Periodically: Verify with calipers every few cases when you start a session.
Deburr Primer Pockets (If Needed): Keep pockets consistent for primer seating depth and ignition uniformity.
Document Your Setup: Note brass brand, firings, trim count, and target length in your load log.
Frequently Asked Questions
Is this the entire trimmer?
No. This is the caliber-specific gauge & shell holder. Pair it with a Lee trimming tool (Cutter & Lock Stud or Quick Trim systems).
Will it fit other brands’ trimmers?
It’s designed for Lee systems. Some users adapt components, but for best results, use Lee’s intended tools.
What trim length does it set?
The gauge indexes to Lee’s 6mm Creedmoor trim-to spec (based on SAAMI). Always verify with current manuals and your chamber needs.
Do I need to chamfer/deburr after trimming?
Yes. After trimming, chamfer inside and deburr outside to protect bullet jackets and ensure smooth seating.
Can I power it with a drill?
Yes—attach the Lock Stud to a low-speed drill for faster cycles. Avoid excess speed/heat.
SEO Highlights (Naturally Integrated)
Lee Precision Gauge Holder 6mm Creedmoor, case length gauge & shell holder, 91340, UPC 734307913403; 6mm Creedmoor brass trimming kit; works with Lee Cutter & Lock Stud, Deluxe Quick Trim, Power Quick Trim; consistent trim-to length, improved neck tension, reduced runout, precision reloading tool for 6mm Creedmoor.
Safety & Responsibility
Always follow safe reloading practices. Confirm trim lengths with current data, wear eye protection, and inspect brass for cracks, loose pockets, or incipient head separation. Keep tools clean and organized to prevent mix-ups between calibers.
Lee Precision Gauge Holder — 6mm Creedmoor (91340): fast, foolproof trimming that delivers uniform brass and downrange consistency for your 6mm loads.
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