Hornady Lock-N-Load OAL Gauge (Straight)Modified Shell NOT Included The Hornady Lock N Load Overall Length Gauge is one of the best kept secrets to accurate reloading. This tool allows reloaders to quickly and easily determine the "proper" bullet seating depth in their firearm by accurately measuring their rifles freebore. By having an accurate measurement of freebore reloaders can significantly improve their rifles accuracy by tailoring their bullet seating depth to their rifle. A few