Hornady Lnl Oal Gauge - Straight

The Hornady Lock-N-Load Overall Length (OAL) Gauge in straight configuration is a precision reloading tool engineered for shooters who demand accuracy in ammunition assembly. Designed specifically for bolt-action rifles and single-shot firearms with straight-line chamber access, this gauge eliminates guesswork when setting cartridge overall length—a critical dimension that directly affects chamber fit, pressure curves, and shot-to-shot consistency. Whether you're a competitive precision shooter, a hunting enthusiast optimizing custom loads, or a serious handloader refining your ammunition, this tool addresses one of the most overlooked variables in the reloading process.

The straight-model design functions by using a modified case (sold separately) inserted into your firearm's chamber to measure the exact distance from the base of the cartridge to the ogive of your bullet seating die. This mechanical reference eliminates tolerance stacking and chamber-to-chamber variations that affect traditional caliper measurements. The gauge's straightforward operation—drop the modified case into the chamber, insert your loaded round, and measure the gap—provides repeatable, firearm-specific data. Its compact construction (16.1 inches overall) makes it portable enough for the loading bench or field testing, while the durable design ensures long-term reliability through countless reloading sessions.

This gauge is essential for reloaders working with any rifle caliber where chamber dimensions vary—from .223 Remington to .300 Win Mag and beyond. Its straight-line configuration makes it ideal for firearms where traditional angled gauges cannot access the chamber properly. Users will need to source a compatible modified case for their specific caliber to fully utilize the gauge, but the investment pays immediate dividends in load consistency and firearm-specific accuracy. Handloaders seeking to match ammunition to individual rifles, reduce velocity spread, and eliminate pressure anomalies will find this Hornady precision instrument indispensable for producing match-grade ammunition.