5 Bushing set replacement for A330,C375,D400,B350,E420,also include a gauge body.
Accurately measure the brass size adjustment to improve safety.
Improve the accuracy of bottleneck measure.
How to determine the proper bushing diameter: Add the neck diameter and shoulder diameter and divide that number by 2, use the bushing that is closest to that number.
The small screws on the comparator body can be adjusted to fix the bushing.
Description
How to determine the proper bushing diameter: Add the neck diameter and shoulder diameter and divide that number by 2, use the bushing that is closest to that number.