The Sinclair Bullet Seating Depth Tool is designed for precision in loading rounds, made from polished stainless steel, and suitable for calibers ranging from 17 to 22 and up.
It includes a Delrin action guide compatible with many bolt-action rifles and offers specialized guides for AR-15's, AR-10's, and Tubb's 2000's.
For accurate measurements, it utilizes fireformed brass and bullets, and is recommended to be used with Bullet Comparators and calipers for precise Base-To-Ogive measurements.