
Availability: In Stock
The Lyman PRO Stainless Headspace Gauge for .308 Winchester is a precision gunsmithing tool built for reloaders who demand accuracy when setting up their sizing dies. This .308 Win headspace gauge is machined from corrosion-resistant stainless steel, giving it a long service life on the reloading bench without rust or degradation. Whether you're a competitive shooter fine-tuning loads or a hunter ensuring consistent case preparation, this gauge lets you verify critical cartridge dimensions before you load.
Headspace gauges serve a specific but essential function: they measure both maximum and minimum cartridge headspace, plus maximum case length. For bottleneck cartridges like .308 Win, these measurements directly affect how your sizing dies perform and, ultimately, how your ammunition chambers and fires. The PRO series design includes flats on the outside of the gauge to prevent it from rolling across your bench, and o-rings that provide a dependable grip during use—thoughtful details that reflect Lyman's gunsmithing heritage.
If you're setting up dies for the first time or verifying an existing setup, a cartridge-specific headspace gauge removes guesswork from the process. This .308 Winchester version is part of Lyman's PRO line, which applies the same precision and attention to detail found in their Pro Die Sets.
| Caliber | .308 Winchester |
| Material | Stainless Steel |
| Type | Headspace Gauge (Max/Min Headspace & Case Length) |
A headspace gauge measures the critical distance from the cartridge's base to its shoulder or datum point. It checks both maximum and minimum headspace specifications, as well as maximum case length. These measurements ensure your sizing dies are set up correctly to produce ammunition that chambers safely and consistently.
This gauge is designed specifically for .308 Winchester bottleneck cartridges. It's used during the reloading process to set up your dies and verify case dimensions, not to test finished ammunition before shooting.
Stainless steel resists rust and corrosion, which means the gauge maintains its precision dimensions over years of use. A corroded or pitted gauge can give inaccurate readings, so the material choice matters for long-term reliability.
Yes. Each cartridge has specific headspace specifications, so you need a caliber-specific gauge. This one is made for .308 Winchester; other cartridges require their own dedicated gauges.

SKU: 144600334 • Weight: 0.5oz





Availability: In Stock
The Lyman PRO Stainless Headspace Gauge for .308 Winchester is a precision gunsmithing tool built for reloaders who demand accuracy when setting up their sizing dies. This .308 Win headspace gauge is machined from corrosion-resistant stainless steel, giving it a long service life on the reloading bench without rust or degradation. Whether you're a competitive shooter fine-tuning loads or a hunter ensuring consistent case preparation, this gauge lets you verify critical cartridge dimensions before you load.
Headspace gauges serve a specific but essential function: they measure both maximum and minimum cartridge headspace, plus maximum case length. For bottleneck cartridges like .308 Win, these measurements directly affect how your sizing dies perform and, ultimately, how your ammunition chambers and fires. The PRO series design includes flats on the outside of the gauge to prevent it from rolling across your bench, and o-rings that provide a dependable grip during use—thoughtful details that reflect Lyman's gunsmithing heritage.
If you're setting up dies for the first time or verifying an existing setup, a cartridge-specific headspace gauge removes guesswork from the process. This .308 Winchester version is part of Lyman's PRO line, which applies the same precision and attention to detail found in their Pro Die Sets.
| Caliber | .308 Winchester |
| Material | Stainless Steel |
| Type | Headspace Gauge (Max/Min Headspace & Case Length) |
A headspace gauge measures the critical distance from the cartridge's base to its shoulder or datum point. It checks both maximum and minimum headspace specifications, as well as maximum case length. These measurements ensure your sizing dies are set up correctly to produce ammunition that chambers safely and consistently.
This gauge is designed specifically for .308 Winchester bottleneck cartridges. It's used during the reloading process to set up your dies and verify case dimensions, not to test finished ammunition before shooting.
Stainless steel resists rust and corrosion, which means the gauge maintains its precision dimensions over years of use. A corroded or pitted gauge can give inaccurate readings, so the material choice matters for long-term reliability.
Yes. Each cartridge has specific headspace specifications, so you need a caliber-specific gauge. This one is made for .308 Winchester; other cartridges require their own dedicated gauges.
SKU: 144600334 • Weight: 0.5oz
