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The L.E. Wilson Case Gage for 223 Rem is one of those bench tools that earns its keep from the first use. It's a one-piece, non-adjustable steel gage machined to reference minimum SAAMI chamber dimensions, so you can check both overall case length and headspace with a single drop of the case. No moving parts, no calibration, no fuss. You just seat the case head-down, set the gage on a flat surface, and read what it tells you across the stepped top.
The process is about as straightforward as reloading tools get. Drop a fired case in to see your as-fired condition and get a read on your chamber. After sizing, set the brass back in and look across the top: the steps on the gage show you the minimum and maximum for both trim length and headspace. If the case sits high or sticks out past max, that's your cue, and you can get an exact number with a caliper or depth mic off the gage surface. It's the quickest way to confirm your sized brass will chamber smoothly before you ever load a round.
Sam Wilson invented the cartridge case gage back in 1935 after helping a fellow shooter track down a case-separation problem, and the design has stayed true ever since. Measuring your shoulder bump this way keeps you from oversizing, which overworks the brass and shortens its life. For anyone loading 223 Rem for a semi-auto, that peace of mind matters, since brass that isn't fully sized back can tie you up at the worst possible moment.
One thing worth noting: this gage checks length and headspace, not body diameters. It's built to be used with fired cases to establish a baseline for full-length sizing and trimming. For straightforward, repeatable case prep on your 223 brass, it's tough to beat.
Drop your case into the gage head-down and set it on a flat surface. Looking across the stepped top shows you the minimum and maximum for trim length and headspace. If a case sits high or protrudes past the step, you can measure the exact difference with a caliper or depth micrometer off the gage surface.
Both, and using it with each tells you something different. A fired case shows you your as-fired condition and gives insight into your chamber, while a sized case lets you confirm your shoulder bump and trim length before loading. It's designed to be used with fired cases first to establish a baseline for full-length sizing and trimming.
No, this gage checks overall case length and headspace only, not body diameters. It's built to reference minimum SAAMI chamber dimensions so you know your brass will fit and chamber correctly. For body diameter you'd need a separate tool.
This is the standard steel Case Gage, model CG-223R. L.E. Wilson also offers a brass version under a different part number, but this listing is the classic machined steel gage. The steel model is the long-running standard that reloaders have relied on for decades.
| UPC | 857949005005 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | CG-223R |
| Shipping Weight | 0.4 |
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