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Trimming .30 Carbine brass to the right length is one of those steps that keeps your reloads feeding smooth and chambering clean, and this little steel gage from L.E. Wilson makes the check about as quick as it gets. It's a one-piece, non-adjustable cylinder with milled surfaces on one end, cut specifically for the .30 M-1 Carbine case. Drop a case in, set the gage on a flat surface, and run a straightedge across the top to see where your brass falls between minimum and maximum length. No dial calipers to fumble with, no guesswork.
The .30 Carbine is a rimless, straight-walled case, which is exactly what this gage is designed for. You set the case on a flat surface, slide the gage over the top with the grooves facing up, then run a straight edge over the top of the gage to read whether the case mouth sits inside the min and max marks. If the brass pokes above the high surface, it's time to trim. It reads overall case length only, so think of it as your go, no-go check rather than a full dimensional inspection.
Case length matters more than folks sometimes realize. Brass stretches as it gets worked, and an over-length case can crowd the chamber and cause pressure and feeding headaches in an M1 Carbine. Catching that before it ever hits the press saves you trouble down the line. This gage gives a repeatable reference every time, which is a nice bit of peace of mind whether you're loading a few boxes or feeding a high-volume plinking habit.
L.E. Wilson is a family-owned outfit that's been building case trimmers, holders, and gages since the 1930s, and this tool carries that same no-nonsense, made-in-the-USA reputation. It's one of those buy-it-once pieces that just lives in your reloading kit and does its job. Keep in mind it checks length only, not body diameters, so it pairs well with a Pistol Max or Min Dimension gage if you want to cover that side too.
Set an empty case on a flat surface, then slide the gage down over the top of the case with the grooves facing up. Run a straightedge across the top of the gage to see whether the case mouth falls between the minimum and maximum milled surfaces. If the brass sits above the high surface, it needs trimming.
No, it checks overall case length only. It does not measure body diameters or headspace. If you want to check those dimensions, L.E. Wilson offers a Pistol Max Gage and a Min Dimension Gage that cover that ground.
This particular gage is cut specifically for the .30 M-1 Carbine case, so it should only be used with that cartridge. L.E. Wilson makes caliber-specific Case Length Gages for a long list of other straight-walled rounds like 38 Special, 45 Auto, and 44 Magnum.
Brass stretches as it's fired and resized, and an over-length case can cause chambering and pressure problems in a semi-auto like the M1 Carbine. Checking length before you load keeps your ammo feeding and functioning reliably. This gage gives you a quick, repeatable way to catch cases that have grown past the max.
| UPC | 815145022226 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | CLG-M1CB |
| Shipping Weight | 0.2 |
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