- Product Dimensions: 2.8 x 1.6 x 0.6 inches ; 2.4 ounces
- Shipping Weight: 2.4 ounces (View shipping rates and policies)
- Domestic Shipping: Item can be shipped within U.S.
- International Shipping: This item is not eligible for international shipping. Learn More
- ASIN: B000PD5VLA
- Item model number: B234
- Average Customer Review: 4.6 out of 5 stars See all reviews (71 customer reviews)
- Amazon Best Sellers Rank: #16,848 in Sports & Outdoors (See Top 100 in Sports & Outdoors)
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Hornady Lock N Load Comparator Set Body & 6 Inserts
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- Includes lock n load comparator, 6 inserts, product manual
- Attaches easily to the blade of your caliper
- Inexpensive and simple way to improve accuracy
- Comes with six inserts
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Measuring cartridge lengths across the bullet tips is not a reliable (or repeatable) method for measuring you loaded rounds. It's common for variations of up to .025" to exist from one round to the next. Hornady's bullet comparator solves that problem by measuring rounds from a reliable surface on the bullet, the ogive, to provide consistent, precise measurements of your rounds. Hornady's Bullet Comparator attaches to the blade of your caliper with a thumbscrew and uses interchangeable insert bushings to measure from the bullet ogive. These bushings are available in fourteen sizes from .17 caliber to .45 caliber. This set comes with inserts for following bullet diameters, .224"(5.56mm), .243"(6mm), .257", .277", .284"(7mm), .308"(7.62 & 8mm)
Top customer reviews
To do this you need a few tools.
The OAL gauge connects to a modified case and allows you to measure the chamber specs of your rifle. You then use those measurements to accurately figure out your riflers preference for your reloaded rounds. The bullets jump to the rifle lands is a very important calculation for accuracy. Too short and the bullet can cock or angle which causes inaccuracy. Too long and the bullet can contact the the lands when fired which can increase pressure in the case which is not only dangerous, but leads to inaccuracy and also an increase in pressure is also not good if you plan on using your cases multiple times.
The whole set up for these measurements cost less than $100. The OAL length gauge, an anvil base, comparator set and inserts, headspace gauge kit, and some modified cases in the caliber you need will get you going. You will also need to connect these to your dial calipers, which if you are reloading your own ammo you should already have dial calipers.
Is all this really needed? No. You can use a reload manual and get a decent round. If you are really looking for accuracy you can then make different loads in different lengths, and eventually arrive at the same place. But how many rounds did you have to go through for each load before you found nirvana with your load? 10? 50? 75? And this needs to be done for every bullet weight and profile, for each of your rifles. At around $1 a load, this equipment easily pays for itself in bullet development.