Product DescriptionThe Hornady Lock-N-Load Curved Overall Length (O.A.L.) Gauge is a fast, repeatable way to determine proper bullet seating depth and manage the bullet "jump" to the rifling for improved accuracy. Designed to insert through the ejection port, this curved model is ideal for autoloaders, lever-actions, and pump-action rifles, while also fitting many bolt-action and single-shot firearms. Use it with a caliber-specific Hornady Overall Length Gauge Modified Case (sold separately) to measure your rifle's freebore and dial in seating depth with confidence.Product Highlights Helps establish precise bullet seating depth by measuring distance to the rifling (freebore) for more consistent accuracy. Curved gauge design allows chamber access through the ejection port-great for autoloader, lever, and pump rifles. Repeatable measurements down to 0.001 inch for fine seating depth adjustments. Locking thumb screw helps hold the push rod position to maintain your measurement. Threaded end accepts Hornady Overall Length Gauge Modified Cases (sold separately) for caliber-specific fit.Specs Brand: Hornady Product Type: Overall Length (O.A.L.) Gauge / Bullet seating depth measuring tool Model: Lock-N-Load O.A.L. Gauge (Curved) MPN: C1550 UPC: 090255704174 Color: Red Material: Aluminum Length: 12.5 in (not extended); 19.25 in (extended) Measurement Resolution: Accurate to 0.001 in Compatibility: Works with autoloader, lever-action, and pump-action rifles; also fits bolt-action and single-shot firearms Important Notes: Requires a caliber-specific modified case (sold separately); not compatible with Adapter "D" or short-bodied cases Country of Manufacture: United States Weight: 0.22 lbDisclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product's manufacturer.