Hornady Lock 'n' load bullet comparator basic

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Hornady Lock 'n' load bullet comparator  basic set - B234

Comparator body &  6 inserts for calibers; .224 (5.56), .243 (6MM), .257, .277, .284 (7MM), .308 (7.62 & 8MM)

Measuring cartridge lengths accross the bullet tips is not a reliable (or repeatable) method for measuring your loaded rounds. It's common for variations of up to .025" to exist from one round to the next. The Hornaday bullet comparator solves the problem by measuring rounds from a reliable surface on the bullet - the ogive - to provide consistent, precise measurements of your rounds. The bullet comparator is also used to check uniformity if bullets from base to ogive. Optional anvil base attaches to the caliper blade for this purpose.

The Hornaday bullet comparator easily attaches to the blade of your caliper with a thumbscrew and uses interchangeable bushings to measure from the bullet ogive. These bushings are available in fourteen sizes from .17 to .45 caliber.

Used in conjunction with the OAL gauge, the bullet comparator provides the ultimate in precision measurement. The bullet comparator will properly align the OAL gauge for precise measurement using your caliper. This method allows direct comparison of your loads as you set up your bullet seating die for any selected bullet free travel (jump).