The Lock‑N‑Load O.A.L. Gauge is universally acclaimed as the most accurate, easy‑to‑use and reliable method of regulating seating depth and the resulting "jump" to the rifling.

Straight Model

Item #C1000For all bolt‑action and single‑shot firearms, or any firearm with straight‑line access to the chamber. This model is preferred, as it is most precise and user friendly.

Curved Model

Item #C1550For all autoloader, lever‑action, or pump‑action rifles. Also fits all bolt‑action and single‑shot firearms. Inserts into chamber through ejection port. Not compatible with Adapter "D" or short‑bodied cases.