$38.72
1 in stock
Online inventory may differ from in-store availability.
Quick turnaround so you get your gear sooner.
Trusted checkout with industry-standard protection.
Keeping Traditions Alive Since 1953
Secure Transactions provided with 
If you handload 257 Roberts and want your brass to last and your rounds to chamber right, the L.E. Wilson Case Gage is one of those tools that earns its spot on the bench fast. This is the one-piece, non-adjustable steel version machined to minimum SAAMI chamber dimensions, so you can drop a case in and get an honest read on where your shoulder and case length sit. L.E. Wilson has been a family-run shop since 1927, and they were the outfit that introduced the case gage back in 1935 after a customer came to them trying to solve a case-separation problem. That history isn't just trivia; it's why this design has stuck around largely unchanged.
There are two things this gage reads. First is datum-to-head length, which is your headspace reference and the number that tells you how far you're pushing the shoulder back when you full-length size. Second is overall case length, so you know when it's time to trim. Drop a fired case in, measure with a caliper or depth mic off the step, then dial your sizing die in slowly until you see about a .001 to .002 inch drop in headspace. That gets you sizing just enough to chamber reliably without overworking the brass. Worth noting: this gage does not measure body diameters, and it's meant to be used with fired cases as your starting reference.
The biggest payoff here is setting up your 7/8-14 full-length sizing dies correctly. Over-sizing brass is one of the most common reloading mistakes, and it quietly shortens case life while hurting consistency. With this gage and a caliper you can nail down exactly how much your die is bumping the shoulder, which means more uniform rounds and brass that holds up through more firings. It's made in the USA from precision-machined steel with a knurled center band for grip, and the build quality is the kind you set up once and trust for years. Handloaders chasing accuracy in the 257 Roberts tend to consider this a needed piece of kit rather than a luxury.
It checks two things: datum-to-head length for headspace and overall case length to tell you when trimming is needed. You read both using a caliper or depth micrometer against the machined step on the gage. Keep in mind it does not measure case body diameters.
No, this is the one-piece, non-adjustable style machined to minimum SAAMI chamber dimensions for 257 Roberts. L.E. Wilson makes an adjustable two-piece version, but that's intended for belted magnum cases. For a rimless cartridge like the 257 Roberts, this fixed gage is the right tool.
Drop a fired case in and take your headspace measurement, then slowly dial in your full-length sizer until you see about a .001 to .002 inch drop in headspace. That sizes the shoulder back just enough to chamber reliably without overworking the brass. To check trim length, set a sized case in the gage head-down on a flat surface and sight across the top against the min and max steps.
It's designed to be used with fired cases as a reference for full-length sizing and trimming your own reloads. You can drop a loaded or factory round in to compare, but its real job is helping handloaders dial in dies and keep brass within spec. That's where it shines on the bench.
| UPC | 857949005531 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | CG-257R |
You must be logged in to post a review.
Reviews
There are no reviews yet.