Hornady Lock-N-Load Headspace Kit

Brass that is close enough still throws groups.

This comparator measures case headspace before and after firing or sizing so you can see what your die is actually doing.

Performance Under Pressure: You compare fire-formed brass from your rifle to resized brass and cut the guesswork out of the next load.

Durability and Reliability: Consistent headspace extends brass life and keeps chamber fit under control.

Friction Removal: Included bushings cover most bottleneck cases from .17 Rem through belted magnums.

Identity Signal: Reloaders who measure stay in charge of safety, accuracy, and brass.

Proof and Credibility: Five bushing sizes, .330, .350, .375, .400, and .420, cover common bottleneck cartridges.

Measure the case. Then load like you mean it.