Forster Products Inc NTG264 Neck Tension Gauge 264 Win Mag

The Forster Products Inc NTG264 Neck Tension Gauge is a precision inspection tool designed for handloaders working with .264 Winchester Magnum ammunition. If you're serious about consistent, high-quality reloads—especially when shooting magnum cartridges that demand tight tolerances—this gauge belongs in your reloading bench. It lets you measure and verify the inside neck diameter of your sized brass before you seat bullets, ensuring you're starting from a known baseline every single time.

Neck tension directly affects how a bullet releases from the cartridge during firing, which impacts velocity spread, accuracy, and pressure consistency. This gauge takes the guesswork out of that critical step. The tool features four stepped diameters that increase in size, each etched with its measurement value. You simply slide the stepped end into your sized case neck until one of the diameters achieves a slip fit—that's your reading. It's fast, repeatable, and gives you the hard data you need to dial in your seating die and case-neck-sizing approach. The gauge also lets you spot potential problems like donuts (material buildup at the neck-shoulder junction) before they waste your time and components downstream.

Whether you're preparing match-grade hunting loads or precision rifle ammunition, consistent neck tension is non-negotiable. The NTG264 turns neck-diameter variation from a blind spot into actionable information, helping you build ammunition that shoots the way you expect it to.

Key Features

• Four stepped diameters for quick, accurate inside-neck-diameter measurement
• Etched measurement values on each diameter for easy reading
• Identifies potential neck-shoulder defects before bullet seating
• Helps optimize neck tension for consistent bullet release and velocity
• Fast inspection workflow—use after sizing and before seating

Specifications

Frequently Asked Questions

What is a neck tension gauge and why do I need one?

A neck tension gauge measures the inside diameter of your case necks after sizing, before you seat bullets. Consistent neck diameter—and thus consistent bullet tension—is critical for velocity uniformity, pressure consistency, and accuracy. It's the difference between guessing and knowing your ammunition is built to specification.

How do I use the Forster NTG264?

After sizing your brass and before seating bullets, insert the stepped end of the gauge into the case neck and slide it in until one of the diameters achieves a slip fit. The etched value on that diameter is your inside neck diameter. Record it to establish your baseline, then use that information to fine-tune your sizing die or seating setup.

Can this gauge detect case damage?

Yes. The gauge can reveal the presence of donuts—bulges of material at the neck-shoulder junction—which indicate potential case failure or poor sizing technique. Catching those before seating saves you time and components.

Is this gauge specific to .264 Winchester Magnum only?

Yes, this is the NTG264 model, designed specifically for .264 Win Mag brass. Forster offers the NTG in other calibers as separate tools.