Precision bullet measurement tool that attaches to any caliper. Includes comparator body and six interchangeable inserts (.224", .243", .257", .277", .284", .308") for measuring bullet ogive and checking uniformity.
The Hornady Lock-N-Load Bullet Comparator eliminates the guesswork from handloading by measuring cartridges from the bullet's ogive rather than the tip. This approach removes the variation that comes from measuring across bullet tips, which can differ slightly from round to round.
When paired with the Hornady Lock-N-Load OAL Gauge (sold separately), this comparator allows you to determine exact bullet seating depth for your specific firearm. The ogive-to-base measurement method provides consistent, repeatable results that tip-to-base measurements cannot achieve.
Bullets from the same box can have slight variations in shape and length. By measuring from the ogive—the curved nose of the bullet—you establish a consistent reference point. This is essential for precision handloading and ensures your ammunition performs predictably in your rifle.