Description
The L.E. Wilson Case Gage for 30-06 Springfield is the kind of simple, do-one-thing-well tool that earns a permanent spot on the reloading bench. It's a one-piece, non-adjustable cylinder gage machined for fired and resized 30-06 brass, letting you quickly reference where your cases sit against minimum chamber dimensions. Drop a case in, set it on a flat surface, and you can read overall trim length by eye or measure headspace with a set of calipers or a depth micrometer.
What the 30-06 Case Gage Actually Checks
This gage reads two things that matter for safe, consistent bottleneck reloading: minimum and maximum case length, and minimum and maximum headspace from the datum on the shoulder back to the head. It's the go-to reference for setting up a standard 7/8-14 full length sizing die, since one of the easiest mistakes in reloading is bumping the shoulder back too far and overworking your brass. Worth noting, it does not measure body diameters, so it's purely a length and headspace reference rather than a full body-dimension check.
Dialing In Your Sizing with the Wilson Gage
The workflow most reloaders settle into is straightforward. Take an initial headspace reading on a fired case, then slowly adjust your full length sizer until you see roughly a .001 to .002 inch drop in headspace. That gets your shoulder bumped just below the chamber's headspace for a snug, repeatable fit that shoots well and keeps case life long. Flip the gage with the head down and sight across the top to check whether your cases need a trim.
Built to Last on the L.E. Wilson Bench
L.E. Wilson has been turning out precision reloading tools for well over 80 years, and this gage carries that reputation. It's made in the USA from steel with knurling in the middle for grip, so it holds its dimensions and won't wear out with regular use. Pair it with a caliper or the Wilson case gage depth micrometer and you've got a dead-simple, repeatable system for 30-06 case prep.
Key Specifications
- Manufacturer: L.E. Wilson
- Manufacturer Part Number: CG-3006
- UPC: 857949005050
- Cartridge: 30-06 Springfield
- Tool Type: Case Length / Headspace Gage
- Style: One-piece, non-adjustable
- Measures: Min/Max case length and min/max headspace
- Material: Steel with knurled center
- Overall Length: Approx. 2.494 in
- Country of Origin: United States
- Shipping Weight: 0.5 lb
What’s Included
- L.E. Wilson 30-06 Springfield Case Gage
- Instructions
- Cardboard box
Frequently Asked Questions
What does the L.E. Wilson 30-06 Case Gage measure?
It checks minimum and maximum case length along with minimum and maximum headspace from the shoulder datum to the case head. You drop a fired or resized 30-06 case in and either read trim length by sighting across the top or measure headspace with a caliper. It does not measure case body diameters.
Do I need calipers or a micrometer to use this gage?
For the most precise headspace readings, yes. The case may sit slightly high or low in the gage, and a caliper or depth micrometer gives you an exact number to work from. You can still eyeball overall trim length against the top edge of the gage without tools.
Can I use the Wilson Case Gage to set up my sizing die?
That's one of its most popular uses. Take a reading on a fired case, then slowly dial in your full length sizer until you see about a .001 to .002 inch drop in headspace. This bumps the shoulder just below chamber headspace for a consistent fit and helps avoid overworking your brass.
Is this gage adjustable or does it work with belted magnum cases?
The 30-06 Springfield gage is the one-piece, non-adjustable regular style made for rimless cases. The adjustable style is a separate product intended for belted magnums. For standard 30-06 brass, this is the gage you want.




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