L.E. Wilson Case Gage 300 PRC – Case Length & Headspace Gauge

Description

If you're loading 300 PRC and want to keep your brass alive longer while staying consistent, the L.E. Wilson Case Gage is one of those simple tools that earns a permanent spot on the bench. It's a one-piece steel gage cut to the 300 PRC chamber dimensions, so you just drop a fired case in and read where it sits. No batteries, no moving parts, just a precise reference you can trust round after round.

The gage checks two things that matter most when you're sizing bottleneck rifle brass: overall case length and datum-to-head length, which is your headspace reference. Measure a case in as-fired condition, resize it, then drop it back in to see exactly how far you set the shoulder back. That feedback is gold when you're setting up a full-length sizing die and trying to avoid pushing the shoulder too far, which is what shortens case life and leads to case separation down the road.

What the 300 PRC Case Gage Tells You

Using the open ends of the gage along with a set of calipers, you can read min and max case length and headspace off the machined steps. When your case starts poking past the trim-to mark, that's your cue to run it through the trimmer. It's a fast way to keep a whole batch of 300 PRC brass uniform without guessing. Worth noting, this gage reads length and headspace, not body diameter, and it's built for fired, rimless cases.

Why Reloaders Reach for the Wilson Gage

L.E. Wilson has been machining reloading tools for the better part of a century, and the case gage design traces back to founder Sam Wilson solving a case-separation problem for a fellow shooter in 1935. That heritage shows in the fit and finish. For precision 300 PRC loaders chasing tight groups at distance, having a known-good reference for shoulder bump takes a lot of the guesswork out of die setup. It's a small tool that quietly makes your reloading more repeatable, and it's made right here in the USA.