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February 4th, 2024

Sunday GunDay: F-Open Rifle with McMillan Kestros ZR Stock

F-Class John AccurateShooter McMillan Kestros ZR gunstock stock review test F-Class

The Southwest Nationals (SWN) is right around the corner. Hosted by the Desert Sharpshooters Rifle Club at the Ben Avery Shooting Facility outside Phoenix, the 2024 SWN takes place February 14-18, 2024. One of the major F-Class matches of the year, the SWN will feature top F-Open and F-TR rifles. And many of those F-Open rigs will be running McMillan stocks. Today’s Sunday GunDay story is about the most sophisticated F-Open stock in McMillan’s line-up, the Kestros ZR.

Kestros ZR Stock — Impressive Design for Competition

Review by F-Class John
Walk the line at just about any rifle competition and you’ll see your share of McMillan stocks. Known for crafting high-quality fiberglass/composite stocks, McMillan has long been at top choice for competitive shooters, hunters, and tactical marksmen. McMillan’s latest top-of-the-line F-Open stock is the impressive Kestros ZR which features an extended front bag-riding Z-Rail. McMillan notes that the ZR’s “extended rail system, which extends the fore-end of the stock, provides all the benefits of the rails on the Kestros R stock while also lowering the center of gravity.” In addition, “the bottom of the buttstock is perfectly parallel to the rail with a 5/8″ flat for improved performance in a rear sandbag.”

The Kestros line features several models, but the ZR represents the pinnacle of craftmanship. Each one is finished off by a single craftsman and takes roughly four times longer to create than any other Kestros. So when McMillan offered me a chance to test one out, I jumped at the opportunity.

F-Class John AccurateShooter McMillan Kestros ZR gunstock stock review test F-Class

The aluminum Z-Rail extends nicely from the front of the stock and has a nice contrast of metal against the matte finish of the stock. I inspected the rails and noticed that they are very cleanly machined — all the corners and rails were precise and sharp. As a result, I grabbed some 1000-grit sandpaper and just lightly knocked the edges and corners down just to keep from accidentally scratching myself or my gear.

F-Class John AccurateShooter McMillan Kestros ZR gunstock stock review test F-Class

When I was ordering the ZR, lead time was about 6-9 months. I was like a kid on Christmas when mine arrived after seven months. Holding a Kestros ZR is definitely a unique experience compared to a traditional wood stock and you can’t help but feel like you’re holding something special. I chose three shades of blue that transitioned dark from the butt stock to lighter on the fore-end in a spectacular flame pattern. With McMillan, there are thousands of possible color and pattern combinations. These color/pattern options are outlined on McMillan’s Gallery Page.

The Kestros ZR comes fully inletted with pillars. I was able to bolt my Defiance action right into the stock “as is” without a bedding job. (McMillan states bedding is not required, though this is certainly something most Kestros owners will do). I threw in my action, fit a couple action screws and tightened it all down. I was amazed at how nicely it all fit together with even the little details like the port cutout being perfectly smooth with my action port. I loaded up some .284 Win rounds and headed to the range to test the new stock at 100 yards.

F-Class John AccurateShooter McMillan Kestros ZR gunstock stock review test F-Class
Here are examples of targets shot with the Kestros ZR at 100 yards.

During initial range testing (see above) I shot nine groups for vertical and all of them were under 0.40″ with the smallest being .08″ of vertical. I topped off the testing by shooting a 200-11X the next week at my club match. The thing that really stood out was how smoothly the stock tracked with its lower center of gravity while shooting free recoil and ultimately this translated to success on target.

F-Class John AccurateShooter McMillan Kestros ZR gunstock stock review test F-Class
Low-Rider — You may find that because of how low the Kestros rides as well as its additional length due to the Z rail, you may require an extension for your front rest.

CONCLUSION — Great Modern Low-Profile F-Class Stock
Overall the Kestros ZR exceeded my expectations. After a small learning curve, it was a joy to shoot and it performed great. As someone who believes in the power of muscle memory, I found each time I transitioned between the Kestros and my traditional wood stocks there was a slight adjustment period but not enough to impair accuracy in any way. Something to consider is that because every Kestros is made to the same dimensions, it makes owning multiples an easy process of switching between guns without any need for readjustment.

For those willing to put in the practice, your patience will be rewarded, and I think most shooters will find the Kestros ZR could become their new favorite stock. If you’re in the market for a new F-Open stock, the Kestros ZR is definitely one to consider.

McMillan Kestros — Proven National Championship-Winning Stock

F-Class Open F-Open Norm Norman Harrold Champion Championship 2018 Raton NM New Mexico 284 Shehane Berger Bullets

Norm Harrold (above) won the 2018 USA F-Open National Championship shooting a .284 Shehane. Norm’s F-Open rig features a McMillan Kestros ZR stock and Bartlein barrel chambered for the .284 Shehane, which has a bit more case capacity than a standard .284 Winchester. Norm loaded Berger 184gr 7mm bullets in Lapua brass. Norm revealed his load in an Erik Cortina YouTube Video.

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Tips for Ordering a Kestros ZR
You can order a Kestros ZR and other Kestros stock models via McMillan’s Competition Stocks Page. While there are a number of options available, McMillan has a helpful guide that walks you through each one to ensure you get exactly what you need. F-Class John notes: “While filling out my form I realized that because I have a custom-designed action, I needed some help, so I gave McMillan a call. The staffers were incredibly helpful and their knowledge of all the major actions out there made answering my questions a snap. I liked the fact that there is no set, fixed price on any of the stocks. The pricing system allows customers to get just what they want (within limits) and not have to pay for anything they do not want or need.”

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February 4th, 2024

See Kelbly’s Actions Being Made and Stocks Fitted — Cool Video

Kelbly's Panda Action gunsmithing video barrel stock bedding

Want to see new-born Pandas? No, not the furry kind — rather Stolle Panda actions produced with state-of-the-art CNC machinery. If you’ve ever wondered how precision benchrest, long-range, and tactical rifles are built, check out video from Kelbly’s. You’ll see actions finished, barrels chambered and crowned, pillars installed in stocks, barreled actions bedded, plus a host of other services performed by Kelbly’s gunsmiths and machinists.

If you’re a fan of fine machine-work, this video should be both informative and entertaining. You can see how precision gun work is done with 21st-Century technology. Tip of the hat to Ian Kelbly and crew for producing this excellent video visit to the Kelbly’s production center.

Click Volume Control to Activate Sound for Kelbly’s Video:

Kelbly's Panda Action gunsmithing video barrel stock bedding

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February 4th, 2024

How to Verify Your Scope’s True Click Values — Box Test

Click Optics MOA turrent verification test

Let’s say you’ve purchased a new scope, and the spec-sheet indicates it is calibrated for quarter-MOA clicks. One MOA is 1.047″ inches at 100 yards, so you figure that’s how far your point of impact (POI) will move with four clicks. Well, unfortunately, you may be wrong. You can’t necessarily rely on what the manufacturer says. Production tolerances being what they are, you should test your scope to determine how much movement it actually delivers with each click of the turret. It may move a quarter-MOA, or maybe a quarter-inch, or maybe something else entirely. (Likewise scopes advertised as having 1/8-MOA clicks may deliver more or less than 1 actual MOA for 8 clicks.)

Nightforce scope turretReader Lindy explains how to check your clicks: “First, make sure the rifle is not loaded. Take a 40″ or longer carpenter’s ruler, and put a very visible mark (such as the center of an orange Shoot’N’C dot), at 37.7 inches. (On mine, I placed two dots side by side every 5 inches, so I could quickly count the dots.) Mount the ruler vertically (zero at top) exactly 100 yards away, carefully measured.

Place the rifle in a good hold on sandbags or other rest. With your hundred-yard zero on the rifle, using max magnification, carefully aim your center crosshairs at the top of the ruler (zero end-point). Have an assistant crank on 36 (indicated) MOA (i.e. 144 clicks), being careful not to move the rifle. (You really do need a helper, it’s very difficult to keep the rifle motionless if you crank the knobs yourself.) With each click, the reticle will move a bit down toward the bottom of the ruler. Note where the center crosshairs rest when your helper is done clicking. If the scope is accurately calibrated, it should be right at that 37.7 inch mark. If not, record where 144 clicks puts you on the ruler, to figure out what your actual click value is. (Repeat this several times as necessary, to get a “rock-solid”, repeatable value.) You now know, for that scope, how much each click actually moves the reticle at 100 yards–and, of course, that will scale proportionally at longer distances. This optical method is better than shooting, because you don’t have the uncertainly associated with determining a group center.

Using this method, I discovered that my Leupold 6.5-20X50 M1 has click values that are calibrated in what I called ‘Shooter’s MOA’, rather than true MOA. That is to say, 4 clicks moved POI 1.000″, rather than 1.047″ (true MOA). That’s about a 5% error.

I’ve tested bunches of scopes, and lots have click values which are significantly off what the manufacturer has advertised. You can’t rely on printed specifications–each scope is different. Until you check your particular scope, you can’t be sure how much it really moves with each click.

I’ve found the true click value varies not only by manufacturer, but by model and individual unit. My Leupold 3.5-10 M3LR was dead on. So was my U.S.O. SN-3 with an H25 reticle, but other SN-3s have been off, and so is my Leupold 6.5-20X50M1. So, check ‘em all, is my policy.”

click values scope Mrad moa scope test

From the Expert: “…Very good and important article, especially from a ballistics point of view. If a ballistics program predicts 30 MOA of drop at 1000 yards for example, and you dial 30 MOA on your scope and hit high or low, it’s easy to begin questioning BCs, MVs, and everything else under the sun. In my experience, more than 50% of the time error in trajectory prediction at long range is actually scope adjustment error. For serious long range shooting, the test described in this article is a MUST!” — Bryan Litz, Applied Ballistics LLC.

Bryan also uses a Tall Target Test to determine true click values. CLICK HERE to read a detailed, explanatory article about Litz’s Tall Target Test.

This article, as published in AccurateShooter.com, contains copyrighted content. It shall not be republished in whole or in part without advanced permission in writing. The act of republishing constitutes legal consent to licensing fees.

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