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If you handload .45 ACP, you already know the frustration of a round that won't seat in the chamber when you're ready to shoot. The RCBS Chamber/Case Length Gauge takes the guesswork out of it. This is a one-piece, non-adjustable gauge machined to check all the critical dimensions of a loaded .45 ACP round at once. You drop a finished cartridge into the gauge, and if it fits, it's good to go in your pistol.
The gauge reads three things that matter most for reliable feeding: case length, case diameter, and overall cartridge length. Since the .45 ACP headspaces on the case mouth, keeping those dimensions in spec is what separates ammo that runs from ammo that hangs up. The caliber is engraved right on the body so there's no second-guessing which gauge you grabbed when you've got several on the bench.
For folks loading in volume, this gauge is a lot quicker than pulling a barrel for the plunk test every time. It's cut close to minimum chamber dimensions, so anything that drops in clean will clear a production pistol chamber with room to spare. It's a smart quality-control step when you're running cast bullets, reloaded brass that's been through the press a few times, or any load where a slightly fat case or long round could cause a hiccup. Catching a problem round at the bench beats clearing a jam at the range every time.
Machined from steel and made in the USA, this gauge is the kind of simple tool that outlives most of the fancier stuff on your bench. There's nothing to adjust, nothing to calibrate, and nothing to wear out. It covers both the .45 ACP standard and metric 11.43x23mm designation, and it backs up RCBS's reputation for reloading tools that just keep working. Toss it in your kit, check your loads, and shoot with confidence.
Drop a finished, loaded round into the gauge base down. If it seats flush and drops in freely, your cartridge is within spec for case length, diameter, and overall length. If it hangs up, you've likely got a fat case, a long round, or a nick on the rim worth sorting out before it hits your magazine.
Your barrel is the ultimate test since that's what you'll actually be shooting, but this gauge is cut to minimum chamber dimensions, so anything that passes will clear a standard production chamber. For reloaders running high volume, it's a lot faster to grab the gauge than to pull the barrel every time. Many handloaders use it as a quick quality check and still plunk test in their barrel when setting up a new load or bullet.
It checks case length against max spec, so an over-length case will show up when it won't seat flush. That said, .45 ACP brass generally doesn't stretch the way bottleneck rifle brass does, so trimming is rarely needed. More often a round that fails to gauge is a slightly oversized case or a crimp issue rather than a length problem.
It's a one-piece, non-adjustable gauge dedicated to .45 ACP only. The caliber is engraved on the body so it's easy to tell apart from your other gauges. If you load multiple calibers, you'll want a matching gauge for each.
| UPC | 604544630091 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 88273 |
| Length | 1.8000 |
| Shipping Weight | 0.13 |
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