Hornady Lock-N-Load Headspace Gauge 5 Bushing Set
The five bushings that come with the Lock-N-Load® Headspace Comparator 
provide the ability to check most bottleneck cases, from .17 Rem through
 belted magnums. Ackley Improved chambers use the same bushing size as 
the parent case. See chart provided or consult product instructions for 
cartridge/bushing size details.
INCLUDES:
- .330 Diameter Bushing
- .350 Diameter Bushing
- .375 Diameter Bushing
- .400 Diameter Bushing
- .420 Diameter Bushing
NOTES:
- Includes bushings only, the Bullet Comparator and Calipers that are required for the set to work are Sold Separately.
- Determining the proper bushing diameter: If you add the neck 
diameter and the shoulder diameter and divide that number by two, use 
the bushing closest to that number.