This accessory is required for use with each specific caliber rifle when setting the maximum over all length of a cartridge. This particular case is for the 375 &H Magnum shell. It is also used to determine the "jump" distance ( projectile ogive to rifling leads) when developing high accuracy hand loads. In conjunction with the Lock-N-Load OAL gauge the Hornady Comparator is needed to duplicate that OA length while ignoring projectile meplat (point) and measuring from the projectile point's curved surface because there are invariable deviations in meplat shapes within any lot of projectiles.
Verified purchase: Yes | Condition: New
Verified purchase: Yes | Condition: New
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