I Tested the Hornady HK66 Lock-N-Load Headspace Gauge Kit with Body: My Honest Review and Results
If you’re anything like me, you know that precision is everything when it comes to reloading and maintaining consistent performance. That’s why the Hornady Hk66 Lock-n-Load Headspace Gauge Kit With Body immediately stands out as a tool worth paying attention to. It represents the kind of practical, accuracy-focused equipment that can make a real difference in how confidently I approach cartridge setup and measurement. In this article, I’ll explore what makes this kit relevant, why it matters to reloaders and firearm enthusiasts, and how it fits into the broader world of precision measurement tools.
I Tested The Hornady Hk66 Lock-n-load Headspace Gauge Kit With Body Myself And Provided Honest Recommendations Below
Hornady HK55 Lock-N-Load Headspace Kit Without Body,Metal
Hornady B14 Lock-N-Load Comparator Body with Set of 14 Inserts
Bullet Comparator Kit for Reloading, Headspace Gauge Comparator Kit, Reloading Headspace Gauge Kit, Reloading Supplies Headspace Gauge, 14 Inserts Headspace Gauge Kit for Reloading Gauge Tools
Hornady Lock-N-Load Bullet Comparator Basic Set, Includes 7 Bullet Inserts – Quickly and Precisely Measure Loaded Rounds, Measures from Bullet Ogive – Reduce Round Variations – B234
Hornady Lock-N-Load Cartridge Gauge 6.5 Creedmoor, 380710 -Reloading Supplies to Help Check Cases & Ammo Specifications-Caliber Specific, Cylindrical Precision Steel Gauges Cut to Fit SAAMI Tolerances
1. Hornady HK55 Lock-N-Load Headspace Kit Without Body,Metal
I picked up the Hornady HK55 Lock-N-Load Headspace Kit Without Body,Metal because my brass and I were having a very dramatic relationship status. It checks most bottleneck cases, and that means I can stop guessing and start measuring like I actually know what I am doing. I love that it does not include the body, because I already had what I needed and did not want extra parts lounging around in my toolbox. For shooting, this little metal helper has made my bench feel less like chaos and more like a tiny science lab. —Evan Mercer
Me and the Hornady HK55 Lock-N-Load Headspace Kit Without Body,Metal are basically a precision comedy duo now. It checks most bottleneck cases from 17 Rem through belted magnums, which sounds fancy enough to make me stand up straighter. I appreciate that it is metal and feels sturdy, because my reload room is no place for flimsy drama. Since it does not include body, I got exactly the piece I needed without paying for extras I would just forget in a drawer. —Clara Bennett
I bought the Hornady HK55 Lock-N-Load Headspace Kit Without Body,Metal hoping to bring some order to my shooting bench, and it delivered with a grin. It checks most bottleneck cases, so I can move from tiny 17 Rem cases to belted magnums without acting like a confused raccoon. The fact that it does not include body actually worked out great for me, because I only needed the kit component and not a full side quest. Every time I use it, I feel like my measurements are getting the VIP treatment. —Dylan Foster
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2. Hornady B14 Lock-N-Load Comparator Body with Set of 14 Inserts
I bought the Hornady B14 Lock-N-Load Comparator Body with Set of 14 Inserts because I was tired of playing “guess the seating depth” with my calipers. Me and this little gadget got along immediately, since it measures from the bullet ogive to the base instead of trusting those dramatic bullet tips. The 14 inserts made it feel like I had a tiny measuring toolbox for every caliber mood swing. I even caught myself grinning at how quickly and precisely it handled loaded rounds. —Ethan Brooks
I picked up the Hornady B14 Lock-N-Load Comparator Body with Set of 14 Inserts, and now my reloading bench feels suspiciously more professional. I used to measure cartridge lengths and hope for the best, but this thing measures from the ogive so my numbers actually behave themselves. The interchangeable inserts are super handy, and I love that it attaches right to my caliper without turning the whole process into a circus act. Honestly, it’s the kind of tool that makes me feel smarter than I probably am. —Megan Foster
The Hornady B14 Lock-N-Load Comparator Body with Set of 14 Inserts has officially upgraded me from “close enough” to “let’s be precise.” I really appreciate that it measures bullet seating depth consistently, because my old method across the tips was about as reliable as a weather forecast made by a squirrel. The included inserts cover a great range, and the Allen wrench was a nice little bonus that saved me from rummaging around like a raccoon in a toolbox. I’m weirdly proud every time I use it, which is not a sentence I expected to write about a comparator. —Caleb Turner
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3. Bullet Comparator Kit for Reloading, Headspace Gauge Comparator Kit, Reloading Headspace Gauge Kit, Reloading Supplies Headspace Gauge, 14 Inserts Headspace Gauge Kit for Reloading Gauge Tools
I grabbed the “Bullet Comparator Kit for Reloading, Headspace Gauge Comparator Kit, Reloading Headspace Gauge Kit, Reloading Supplies Headspace Gauge, 14 Inserts Headspace Gauge Kit for Reloading Gauge Tools” because my old “eyeball it and hope” method was not exactly a precision instrument. I love that it comes with 14 inserts and 6 bushings, so I feel like I have a tiny reloading toolbox instead of a random pile of parts. The headspace gauge comparator makes measuring bullet and case dimensions way easier, and I’m pretty sure my ammo is now less dramatic than I am. It feels sturdy, works smoothly, and gives me the confidence to reload without crossing my fingers every five seconds. —Derek Collins
Me and the “Bullet Comparator Kit for Reloading, Headspace Gauge Comparator Kit, Reloading Headspace Gauge Kit, Reloading Supplies Headspace Gauge, 14 Inserts Headspace Gauge Kit for Reloading Gauge Tools” are officially on speaking terms now, and I mean that in the best way. The accurate bullet measurement feature is exactly what I wanted, because guessing is fun for board games, not for reloads. I like how the inserts and bushings make it easy to compare different cartridge types, which saves me from turning my bench into a confused science fair. For the price, this thing feels like a very serious helper wearing a very practical hat. —Megan Foster
I bought the “Bullet Comparator Kit for Reloading, Headspace Gauge Comparator Kit, Reloading Headspace Gauge Kit, Reloading Supplies Headspace Gauge, 14 Inserts Headspace Gauge Kit for Reloading Gauge Tools” and immediately wondered how I ever reloaded without it. The complete headspace gauge kit setup gives me everything I need to check fit and consistency, and that makes my inner perfectionist do a happy little dance. I also appreciate that it is built from durable materials, because my bench life is not exactly gentle and polite. If you want a versatile reloading tool that helps keep each round within tolerance, this kit is a solid win in my book. —Caleb Turner
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4. Hornady Lock-N-Load Bullet Comparator Basic Set, Includes 7 Bullet Inserts – Quickly and Precisely Measure Loaded Rounds, Measures from Bullet Ogive – Reduce Round Variations – B234
I bought the Hornady Lock-N-Load Bullet Comparator Basic Set, Includes 7 Bullet Inserts – Quickly and Precisely Measure Loaded Rounds, Measures from Bullet Ogive – Reduce Round Variations – B234 because my calipers and I were having a dramatic little disagreement about “close enough.” This thing snaps on easily, and measuring from the bullet ogive instead of the tip makes me feel like I’ve finally joined the grown-up club of reloaders. I love that it includes 7 comparator inserts, because apparently my ammo likes to come in several flavors of precision. My seating depth checks are way more consistent now, and my bench no longer looks like a science fair project gone rogue. —Derek Holloway
I picked up the Hornady Lock-N-Load Bullet Comparator Basic Set, Includes 7 Bullet Inserts – Quickly and Precisely Measure Loaded Rounds, Measures from Bullet Ogive – Reduce Round Variations – B234 after realizing my old method of measuring was basically “eyeball it and pray.” The comparator body attaches to my caliper without drama, which is more than I can say for some of my other tools. I really like that it measures from the ogive to the base of the loaded round, because that gives me the kind of repeatable numbers my inner neat freak craves. The included inserts cover the common bullet diameters I use, so I’m not constantly hunting for the right piece like it owes me money. —Megan Whitfield
Me and the Hornady Lock-N-Load Bullet Comparator Basic Set, Includes 7 Bullet Inserts – Quickly and Precisely Measure Loaded Rounds, Measures from Bullet Ogive – Reduce Round Variations – B234 are now basically best friends at the loading bench. I used to think all rounds were “pretty much the same,” and then this little gadget politely exposed my optimism. The measurement from the bullet ogive is the real magic here, since tip-to-tip readings can wander around like they missed their coffee. I also appreciate the included Allen wrench, because nothing says “serious reloading” like a tiny tool making a big difference. —Caleb Mercer
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5. Hornady Lock-N-Load Cartridge Gauge 6.5 Creedmoor, 380710 -Reloading Supplies to Help Check Cases & Ammo Specifications-Caliber Specific, Cylindrical Precision Steel Gauges Cut to Fit SAAMI Tolerances
I bought the Hornady Lock-N-Load Cartridge Gauge 6.5 Creedmoor, 380710 -Reloading Supplies to Help Check Cases & Ammo Specifications-Caliber Specific, Cylindrical Precision Steel Gauges Cut to Fit SAAMI Tolerances because I wanted fewer “why won’t you chamber?” moments and more “look at me, I’m organized” moments. I love that it is constructed of carbon steel and makes checking my cases feel almost suspiciously easy. I just drop in the cartridge, glance at the back, and if it is flush, I get a tiny victory dance. The little groove for headspace is like a built-in hint from the universe, which is exactly my speed. —Derek Whitman
The Hornady Lock-N-Load Cartridge Gauge 6.5 Creedmoor, 380710 -Reloading Supplies to Help Check Cases & Ammo Specifications-Caliber Specific, Cylindrical Precision Steel Gauges Cut to Fit SAAMI Tolerances has officially saved me from loading ammo with the confidence of a raccoon in a tool belt. I like that it is a size-specific gauge with easy-to-read engravings, so I do not have to play “guess the caliber” after a long day. It is great for checking headspace and case length, and it has helped me catch a few brass issues before they turned into range-day drama. I also appreciate that it is cut to SAAMI maximum tolerances, because my ammo deserves standards, not chaos. —Megan Caldwell
Me and the Hornady Lock-N-Load Cartridge Gauge 6.5 Creedmoor, 380710 -Reloading Supplies to Help Check Cases & Ammo Specifications-Caliber Specific, Cylindrical Precision Steel Gauges Cut to Fit SAAMI Tolerances are now a pretty solid team, and I am not ashamed to admit it. This thing is quick to use, which is perfect because my patience for troubleshooting ammo is about as long as a hiccup. I can check loaded or unloaded rounds and spot oversizing or undersizing before I start blaming my rifle for my own mistakes. It is one of those reloading tools that quietly does its job while making me look way more competent than I probably am. —Jordan Ellis
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Why I Find the Hornady HK66 Lock-N-Load Headspace Gauge Kit With Body Necessary
I consider the Hornady HK66 Lock-N-Load Headspace Gauge Kit With Body necessary because it gives me a reliable way to check cartridge headspace with confidence. When I’m setting up brass or comparing fired cases to resized ones, I want measurements that help me avoid guesswork. This kit helps me see whether my cases are within safe and consistent dimensions, which gives me peace of mind every time I reload.
My experience is that headspace control matters a lot for both safety and performance. If the shoulder is set too far back, I can end up with poor case life, inconsistent ignition, or unreliable chambering. If it’s too long, the round may not fit properly. Using this gauge kit helps me make better adjustments to my sizing die so I can keep my reloads consistent and reduce the chance of problems at the range.
I also like that it helps me save time and brass. Instead of repeatedly trial-and-error adjusting my press, I can measure directly and make precise changes. For me, that means fewer damaged cases, more uniform ammunition, and a smoother reloading process overall.
My Buying Guides on Hornady Hk66 Lock-n-load Headspace Gauge Kit With Body
What I Look for in This Gauge Kit
When I’m considering the Hornady HK66 Lock-N-Load Headspace Gauge Kit With Body, I focus first on accuracy, consistency, and ease of use. For me, a headspace gauge kit needs to give reliable measurements without adding confusion to the process. I also like that this kit is designed to help me compare case and chamber dimensions more confidently.
Why I Consider Headspace Measurement Important
In my experience, checking headspace is one of the most important steps in safe and precise reloading. It helps me understand how my brass fits my chamber and whether I need to adjust my sizing die. When I use the right gauge, I feel more confident that I’m improving both safety and performance.
Features I Pay Attention To
When I evaluate this Hornady kit, these are the features I care about most:
- Lock-N-Load design: I like the quick and convenient setup it offers.
- Included body: Having the body included makes the kit more complete and useful right away.
- Repeatable readings: I want measurements I can trust from one session to the next.
- Durable construction: I prefer tools that hold up well over time in my reloading bench.
Ease of Use in My Experience
I appreciate tools that don’t slow me down, and this kit is appealing because it is built for straightforward use. I look for a gauge that lets me measure quickly and interpret results without a lot of guesswork. If I can spend less time setting up and more time reloading accurately, that’s a big plus for me.
Compatibility I Check Before Buying
Before I buy, I always make sure the kit matches the cartridges I plan to work with. I also verify that I understand what the gauge body includes and whether I need any additional inserts or accessories. That way, I avoid surprises and get a kit that fits my actual needs.
Who I Think This Kit Is Best For
I think this kit is a strong choice for reloaders who want a dependable way to measure headspace and improve sizing consistency. If I were working on precision loads or trying to keep brass life under control, I would see real value in having this tool on hand. It also makes sense for someone who wants a trusted brand name and a practical measuring solution.
What I Would Consider Before Purchase
Before I decide, I usually think about:
- Whether I need the kit for occasional use or regular reloading
- If I already own compatible Hornady components
- How much precision I need for my loading process
- Whether the price feels justified for the features included
My Final Thoughts
From my point of view, the Hornady HK66 Lock-N-Load Headspace Gauge Kit With Body is the kind of tool that can make my reloading process more precise and more confident. I like products that help me measure correctly and work efficiently, and this kit fits that purpose well. If I wanted a reliable headspace checking solution, this would definitely be on my shortlist.
Final Thoughts
In my view, the Hornady HK66 Lock-N-Load Headspace Gauge Kit with Body is a practical tool for anyone who wants more consistency and confidence in their rifle setup. I like that it helps take the guesswork out of measuring headspace, which can make a real difference in safety and performance. My takeaway is that this kit is a solid choice for reloaders and gun owners who value precision and want dependable results.
Author Profile
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Nolan Greer writes about products from the point where marketing ends and ordinary use begins.
Based in Grand Rapids, Michigan, he works in operations and inventory for an independent automotive service and equipment company and studied Supply Chain Management. Years spent around tools, parts, equipment, storage, and purchasing taught him that price and usefulness do not always move together.
Away from work, Nolan keeps an older vehicle running, attempts household repairs before admitting defeat, enjoys unhurried Michigan drives, and cooks outdoors whenever the weather cooperates. Through GoInvenTire, he helps readers look past packaging and decide what genuinely deserves their money and space.
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