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Hornady Oal Gauges Oal Gauge Straight

Regulating seating depth and the resulting «jump» to the rifling is widely regarded as fundamental to improved accuracy. A few thousandths of an inch change between the bullet and the rifling can make the difference between average accuracy and real tack-driver performance. Photo of O.A.L. Gauges

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 #C1000

For 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 #C1550

For 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.

To use the Lock-N-Load O.A.L. Gauge, you will need a Modified Case (sold separately) to fit your firearm’s chamber and thread it onto the gauge. These specially prepared modified cases are threaded at the case-head and have a .002″ oversized neck to accept the same bullets you intend to load.

This is critical, as the Lock-N-Load O.A.L. Gauge dimensions obtained will be accurate to .001″. These results cannot be attained with competitive products, which use a simulated bullet with an arbitrary shape.