Bullet Comparator Inserts are designed for use with the Lock-N-Load Bullet Comparator; it eliminates variables when measuring the over-all length of a bullet. Bullet length can vary a few thousandths due to material variation and tip finish. The Lock-N-Load Bullet Comparator Inserts allow the reloader to measure the bullet from the base to a specific point on the ogive, which has little variation, if any. This versatile system also provides the reloader with a much more consistent way to monitor the overall length of their reloads, allowing the reloader to build more precision into their handloads.