Measuring cartridge lengths across the bullet tips is not a reliable (or repeatable) method for measuring loaded rounds. Its common for variations of up to .025" to exist from one round to the next. Our Bullet Comparator measures rounds from the ogive to provide consistent, precise measurements. You can also use it to check uniformity of bullets from base to ogive.
Our Bullet Comparator easily attaches to the blade of your caliper and uses interchangeable inserts (available in sizes from .17 caliber to .45 caliber) to measure from the bullet ogive.
Bullet Comparator – Basic Set
Comparator body and 6 bullet inserts for bullet diameters: .224" (5.56mm), .243" (6mm), .257," .277," .284" (7mm), .308" (7.62 & 8mm)
Slot on comparator body is cut off-center
To position the comparator with the Hornady Lock-N-Load Overall Length Gauge, install comparator body to the caliper with the screw through the thicker leg of the body. This allows the proper off center alignment of the Length Gauge.