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Hornady does not specifically list the Bushing for 257 WBY Mag. However, this is what Hornady states, "Determining the proper bushing diameter: If you add the neck diameter and the shoulder diameter and divide that number by two, use the bushing closest to that number."
I used these to measure the case of fired brass and to better resize my brass to get a consistent COL on my reloads. You will also need to purchase the Hornady bullet bushings set and a case overall measurement tool to get the right COL that fits the...
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I Measure cases after firing, then adjust my sizing die to bump the shoulder back .002 inches. Before I bought this I used a "GO-NO GO" gauge, which just tells you if the cartridge will chamber. With this gauge I can now control the headspace for mor...
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2/2 found this helpful
Most Recent Reviews
A must have
by
Shooter,
Verified Owner,
April 28, 2024
If you're loading precision bottle neck cartridges or even just want to be sure they'll chamber well, you need to be using these gauges.
Brand new box contained duplicate dies, not the five different dies (.33 through .42) advertised. There is not purpose for a duplicate die, and I needed the .420 die for case headspace measurement of a 300. Much hassle for a very basic qc issue.
This tool is a must have if you wish to control headspace in your reloading to increase accuracy and hopefully increase case life. Too much headspace causes overworking your brass and not enough causes feeding issues. This gauge system will dfinately...
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First off this equipment was a gift for a friend who is trying too shoot long range and have a great score! I really don't know a lot about this subject but this is all he and others talked about and they said this was some of the best equipment to d...
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Product Info for Hornady Lock-N-Load Headspace Gauge With Five Bushings HK66
Hornady Lock-N-Load Headspace Gauge HK66 is an excellent way to compare your handloaded casings with their fire-formed brass counterparts. A great reloading tool for extending the life of your brass, the Headspace Gauge measures variations in your casing before and after firing, allowing you to adjust for the deformations that can occur under the extreme heat and pressure of a rifle discharge. This valuable piece of Hornady reloading equipment attaches to a pair of calipers using a thumbscrew and allows you to check most bottleneck casings. Hornady has included five bushings in the Hornady LNL Headspace Gauge, ranging from .330 to .420, so you can accurately assess all sorts of casings. To improve your casings' longevity, safety, and accuracy, compare and assess them using the Hornady Lock-N-Load Head Space Gauge.
Specifications for Hornady Lock-N-Load Brass Headspace Gauge:
Calibers:
Bushings for .330, .350, .375, .400, and .420
Features of Hornady LNL Casing Headspace Measure:
Compare brass before and after firing or re-sizing