HORNADY 380700 380 ACP CARTRIDGE GAUGE

The Hornady 380 Auto Cartridge Gauge (380700) is a Lock-N-Load pistol case gauge that lets you quickly confirm your sized brass and loaded 380 ACP ammunition will fit correctly in a SAAMI spec chamber. This Hornady 380700 380 Auto cartridge gauge gives reloaders a fast bench check for headspace, case length, and basic cartridge profile on 380 ACP reloads.

Key Features

• Manufacturer part number: 380700
• Cartridge: 380 Auto / 380 ACP (.355 diameter)
• Product type: Lock-N-Load cartridge gauge
• Function: checks sized cases and loaded cartridges for correct fit in SAAMI chambers
• Gauge style: go/no-go style drop-in gauge
• Construction: high carbon steel body machined to SAAMI maximum and minimum dimensions
• Compatibility: works with empty sized brass and complete loaded 380 Auto rounds
• Quantity: one cartridge gauge per package

Special Features

• Drop a case or loaded round into the gauge to see whether it sits within the machined reference surfaces, giving you an instant visual pass or fail on sizing and trimming.
• The internal profile mirrors a proper 380 ACP chamber, which helps you catch brass that is too long, bulged, or under-sized before it causes feeding or chambering problems.
• One-piece steel construction provides a durable, long lasting reference tool for frequent use on the reloading bench.
• Dedicated 380 Auto geometry gives you a cartridge-specific check instead of relying on feel when test-fitting rounds in a pistol barrel.

Practical Benefits

• The Hornady 380 Auto Cartridge Gauge (380700) helps you detect headspace and case length issues at the bench so your 380 ACP ammo chambers smoothly and runs reliably.
• You can sort questionable brass and confirm that resized cases and finished rounds work with typical SAAMI chambers, reducing how often you need to test batches in the firearm.
• As you dial in your sizing die and trimming process, this gauge provides a consistent standard so your 380 Auto reloads feed and perform the way you expect in carry, training, and range pistols.