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November 5th, 2023

Sunday GunDay: Sebastian Lambang’s F-Open Rifle in 7 FCP

Sebastian seb lambang f-class rifle 7 FCP Blake Barrel borden action f-open National championship arizona

November 5th is the final day of the 2023 NRA F-Class National Championships at the Ben Avery shooting facility in Phoenix, Arizona. Along with America’s ace F-Open and F-TR shooters, there are many top foreign shooters at the Nationals, including Sebastian (“Seb”) Lambang, creator of the outstanding SEB Rests and SEB Joystick bipods. For this Fall 2023 event, Seb commissioned a handsome new, state-of-the-art F-Open rifle built by Blake Barrel and Rifle. Above is Seb’s F-Open rifle on the firing line this week at Ben Avery. For full results from the F-Class Nationals, click the link below:

» 2023 NRA F-Class Nationals Results Page (F-Open & F-TR)

Seb Lambang’s impressive new 7 FCP rig was crafted by Blake Barrel and Rifle using a 7mm, 1:8.5″-twist Blake barrel chambered in 7 FCP fitted to a Borden Accuracy BRMXD action. Mated to the Borden action is a Bix’N Andy Competition Benchrest trigger. On top is a March 10-60x56mm HM scope.

The handsome laminated wood XR stock is made by Cerus Rifleworks. The XR stock boasts a R.A.D. recoil reduction system in the rear, and a metal bag-rider system at the forward end of the stock. The rig employs an adjustable F-Class Products F-Open Barrel Tuner.

Sebastian seb lambang f-class rifle 7 FCP Blake Barrel borden action f-open National championship arizona

Sebastian seb lambang f-class rifle 7 FCP Blake Barrel borden action f-open National championship arizona

Sebastian seb lambang f-class rifle 7 FCP Blake Barrel borden action f-open National championship arizona

Sebastian seb lambang f-class rifle 7 FCP Blake Barrel borden action f-open National championship arizona
Seb Lambang is a talented shooter as well as a great craftsman. On the side of his March X scope it states: “Sebastian Lambang, QRA Queens 2022, F-Open Winner”.

Sebastian seb lambang f-class rifle 7 FCP Blake Barrel borden action f-open National championship arizona

Sebastian seb lambang f-class rifle 7 FCP Blake Barrel F-class products tuner F-Open

To see more images of this rifle, visit Seb Lambang’s Facebook Page.

Sebastian Lambang — Founder and Chief Designer of SEB Rests
When he is not competing, Seb works hard producing SEB Front Rests, SEB Neo-X Rests, SEB Mini-X tripod rests, and the class-leading SEB JoyPod-X joystick bipod, favored by F-TR shooters worldwide. Here are products at Seb’s warehouse, getting ready to be shipped out.

Sebastian seb lambang f-class rifle 7 FCP Blake Barrel borden action f-open National championship arizona
Sebastian Lambang Neo-X front rest

About the 7 FCP — New 7mm Cartridge Derived from 6.5 PRC

The 7 FCP was a cartridge designed from the ground up by F-Class Products out of Phoenix, Arizona in the fall of 2022. The developers believe it is the “ultimate cartridge” for the F-Class Open Division competition. F-Class Products notes: “We wanted a cartridge that [had] an efficient case capacity [matching] the 7mm Remington Short Action Ultra Magnum. The 7 RSAUM has proven to be the most winning cartridge in world F-Class competitions and many nationals and finale events. The problem with the RSAUM is brass availability. Remington stopped making brass for the RSAUM years ago and recently Norma has also stopped producing brass for it. The only option now is ADG. While the ADG brand of brass is good, it is quite expensive and also is only run in short runs and is hardly ever available.”

So the 7 FCP was developed from the 6.5 PRC, which has high-quality Lapua brass available. The 7 FCP was designed to shoot the 180 grain Berger Hybrid bullet at 2960 FPS out of a 30″ barrel without excessive pressure. SEE: 7 FCP Cartridge INFO FAQ Page.

7 FCP Cartridge — Wildcat Based on 6.5 PRC Necked up to 7mm

Sebastian seb lambang f-class rifle 7 FCP Blake Barrel borden action f-open National championship arizonaHow Does the 7 FCP’s Case Capacity Compare?
F-Class Products states: “The parent case of the 7 FCP is a 6.5 PRC. The 6.5 PRC is a magnum case that has a head diameter of 0.532″ and has a overall length of 2.020″. It is the same overall length as the 7 RSAUM but with a smaller diameter body. Hence, without improving it, you will get not get the case capacity of a 7 RSAUM case, and therefore you will not get the velocities that the 7 RSAUM produces either.” F-Class Products has compared the capacity of cases commonly used in F-Open competition:

.284 Winchester = 63 grains of water capacity
.284 Shehane = 66.5 grains of water capacity
6.5 PRC = 65 grains of water capacity
7-6.5 PRC = 66.5 grains of water capacity

As you can see by the data above, the 6.5 PRC that is simply necked up to a 7mm does not provide more case capacity than the .284 Shehane. That is why the PRC has the shoulder moved forward.

What Powders Work Well in the 7mm FCP?
F-Class Products has tested many powders with the 7 FCP: “Any powders that work well in a .284 Win, a .284 variant or a 7 RSAUM and/or variant, can work well in the 7 FCP. We have tested many different powders and many show to work excellent. Here is a list of the powders we have tested that work well in our testing and in our customers’ testing:

Hodgdon H4350
Hodgdon H4831
Hodgdon H4831 SC
Alliant Reloder 16
Alliant Reloder 23
Vihtavuori N160
Vihtavuori N550
Vihtavuori N555

This is just a short list of what we believe are the core powders that will burn and work efficiently in the 7 FCP. There are plenty of other powders that also can work, yet they may be temperature sensitive and or not burn efficiently in the case.”

What Velocities Are Optimal?
F-Class products observes: “With the 180 grain Berger bullet we see accuracy from 2920-2980 FPS muzzle velocity. With the 190 grain Hornady A-Tip bullet we see accuracy from 2860-2900 FPS.”

What Twist Rates Do You Recommmend?
F-Class Products recommends a 1:8.5″-twist barrel. An 8-twist can work, yet the accuracy nodes may be narrower than the 8.5 twist. A 9-twist barrel can also work if you are shooting a 184 grain bullet or less. These twist rates are recommended for lead cored bullets. If you are planning on shooting a solid copper bullet, consult the bullet manufacture for recommended twist rates for that particular bullet.

What Is the Parent Case?
The parent case of the 7 FCP is a 6.5 PRC. The 6.5 PRC is a magnum case that has a head diameter of 0.532″ and has a overall length of 2.020″. It is the same overall length as the 7 RSAUM but with a smaller diameter body, hence without improving it, you will get not get the case capacity of a 7 RSAUM case, and therefore you will not get the velocities that the 7 RSAUM produces either.

For more information visit the 7 FCP Facebook Group.

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January 16th, 2020

Gorgeous F-Class Rifles from KW Precision

Delaware F-Open F-Class rifle Cerus Brux barrel Panda Action

Forum member Keith W. (aka “Cigarcop”) of KW Precision LLC is a talented riflesmith whose projects display outstanding finish work and attention to detail. Keith does some of the best bedding work we’ve ever seen. Back in 2018, Keith built a stunning F-Class rig for a shooter in Delaware. It’s a beauty, that’s for sure. Keith has posted more details about this rifle in a Shooters’ Forum Thread.

Delaware F-Open F-Class rifle Cerus Brux barrel Panda Action

This handsome rifle features a polished Stolle (Kelbly) Panda Action, and two (2) Brux barrels, both chambered for the .284 Winchester cartridge. The real eye-catching component of this rifle is the stunning Cerus F-Open stock. This features multiple laminations with highly-figured Walnut on the sides. This certainly ain’t your “off-the-shelf” laminated stock. This just shows the beauty that can be achieved with carefully-chosen lamination layers (plus 12 coats of clear).

Delaware F-Open F-Class rifle Cerus Brux barrel Panda Action
This beautiful F-Open rig features a laminated wood stock with stunning figured walnut on the outside.

Keith of KW Precision LLC is renowned for his bedding work, and this rifle shows why. Keith takes great pride in his work, and his attention to detail is second to none. This bedding job is as good as it gets.

Delaware F-Open F-Class rifle Cerus Brux barrel Panda Action

Bringing out the figure in the wood requires multiple finish coats (and careful sanding between coats). But the results are worth it. Shown below is the Cerus stock, BEFORE the finish coats were applied. It took time and effort to transform the “naked” Cerus stock into a true stunner. Keith applied twelve (12) coats of PPG Automotive Clear with wet sanding between each coat.

Delaware F-Open F-Class rifle Cerus Brux barrel Panda Action

And Another Beauty — This One Built for Capstone’s Boss

Delaware F-Open F-Class rifle Borden Action F-TR

CigarCop recently completed a handsome rifle for Bill Gravatt, President of the Capstone Precision Group, distributor for Berger, Lapua, Vihtavuori, and SK products. This F-TR rig is another example of beautiful craftsmanship. Look at that bedding job in the lower photo! To learn more about this rifle, which features a black Borden Rimrock BRM action (with fluted bolt), read this Shooters’ Forum Thread.

Delaware F-Open F-Class rifle Borden Action F-TR

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December 5th, 2017

Competition Hardware — The Modern F-Open Rifle

.284 Win F-Class F-Open Rifle Emil Kovan Brux BAT M Master Class Bernosky

Emil Kovan is one of the top F-Class shooters in the world. He won the 2014 United States F-Open Championship. Earlier this month Emil finished second in F-Open Division at the 2016 Canadian National F-Class Championship in Ontario. Emil actually tied Open-class winner Shiraz Balolia for overall score AND “V”-count, but Emil was awarded second on the tie-breaker.

The Anatomy of a Modern F-Class Open Rifle

Report by Emil Kovan
Kovan Match Rifles LLC, www.matchrifles.com

“What are the best components for an F-Open class rifle, and why?” That’s a question that I get asked all the time and will try to answer in this article. Two months ago, I was contacted by Duane, a gentleman I met at the 2015 F-Class Nationals. He was interested in building a rifle with the new Master Class Low Profile F-Open Stock, created by Carl Bernosky and Alex Sitman of Master Class Stocks.

I have known Alex Sitman for many years, and use his stocks exclusively, but was not very familiar with his new Low Profile F-Open stock. After a brief conversation with Alex, I placed an order, and had the stock inletted and bedded at my shop in a month. My first impression was “Wow that’s a long stock” — the forearm is significantly longer than on the original Master Class F-Class prone stock. I bolted the barreled action in, and squeezed the end of the forearm and barrel together, the stock flexed a little bit, but not as much as other designs that I have tested. I think that’s due to having “more meat” in the receiver area. The full stock depth continues farther forward that on some other “low profile” designs. That makes the stock stiffer in the vertical plane, reducing the hinging effect forward of the action. The stock was finished in gloss black per the customer’s request. Interestingly, I found that the multiple layers of paint and clearcoat stiffened the stock up quite a bit.

CLICK IMAGE below for full-screen version
.284 Win F-Class F-Open Rifle Emil Kovan Brux BAT M Master Class Bernosky

Low Center of Gravity Tames Torque
Compared to the original Master Class F-Open stock, the barrel sits about an inch lower. Lower center of gravity equals less torque, and that is very important when shooting heavy bullets in fast twist barrels. Another significant improvement is that the toe of the stock is flat and parallel to the forearm. I added a 3/4″ track rail in the rear, and milled the underside of the fore-end to create two parallel “rails” in the front to help the stock track better.

One of the biggest reasons why I like Master Class stocks, is the pistol grip. I don’t shoot “free recoil” and a comfortable pistol grip is super important to me when selecting a stock. The new Master Class Low Profile stock shares the same grip as the old model. This allows the stock to accommodate either a “hard hold” style or a more free-recoil style of shooting — whatever the rifle’s owner prefers. This design versatility is one reason I recommend Master Class stocks. Shooters may experiment with either shooting style to find what suits them best.

.284 Win F-Class F-Open Rifle Emil Kovan Brux BAT M Master Class Bernosky

Cartridge Choice — A 40° .284 Win Improved
Duane decided to have the barrel chambered for my 284 KMR IMP (Improved) wildcat. What is .284 KMR IMP and why choose it over the straight .284 Winchester? Improved by definition means “made better”, I took a great cartridge, and modified it to increase capacity, reduce pressure, and increase brass life.

There are many “improved” variants of the original .284 Winchester: 7mm Walker, .284 Shehane, .284 Ackley and so on. My version, the 284 KMR IMP, shares the .010″ blown-out sidewalls of the .284 Shehane, but I have further increased the case capacity by changing the shoulder angle from 35 to 40 degrees. The 284 KMR IMP allows you to almost match magnum cartridge velocity in a standard-bolt-face action. If you want to run 180gr-class 7mm bullets over 2900 FPS, it is cheaper and more convenient to have a barrel chambered in 284 KMR IMP than to spend $650 for a magnum bolt.

Tuning Loads for the .284 Win Improved Cartridges
The 284 KMR IMP seems to have two nodes, one around 2820 fps and other at 2940 fps. My match load clocks at 2935 fps with single-digit ES. Note –I selected that load based on accuracy, NOT raw speed. A lot of novice (or hard-headed) shooters make the mistake to push their cartridges to the max, and disregard more accurate loads at lower velocity.

.284 Win F-Class F-Open Rifle Emil Kovan Brux BAT M Master Class Bernosky

The sport of F-Class is rapidly growing, and the equipment used is improving constantly. I remember that only few years ago, an F-Open rifle that could shoot sub-one-inch of vertical at 300 yards was considered competitive. Now, we are pursuing sub-one-inch vertical at 600 yards! It takes a great rifle to approach that goal, but it is also up to the shooter to learn and experiment as much as possible in order to achieve success.

Dies for an Improved .284 Win Cartridge
One of the biggest challenges in campaigning a wildcat cartridge has been obtaining great dies. When searching for custom dies, it almost seems like that the odds are stacked against us. The most common problem is wait-time — custom die orders can take months to be completed. Also, most custom die makers want you to send them two or three cases, each fire-formed three times. I find that funny because if could somehow properly size the cases for three fire-forming cycles, I would not need a sizing die.

.284 Win F-Class F-Open Rifle Emil Kovan Brux BAT M Master Class Bernosky

Custom-made dies should size the case just right, but sometimes the die’s internal dimensions are slightly off, and this leads to problem number two: dies sizing too much (or even worse) too little. I had a one “custom” die that would not size the bottom of the case enough. This made the extraction of fired cases very difficult. I feel that the best option (if available) for shooters interested in wildcat chambers is to have their gunsmiths make the dies. I offer that die-making service in addition to barrel chambering.

BAT Machine “M” Action
Duane decided to use a BAT M action for this rifle, and I think that he could not have made a better choice. We are blessed with many good match-quality receivers: Barnard, BAT, Borden, Kelbly, Nesika, and Stiller just to mention a few. These are all very well-made and suitable for F-Class. Among BAT Machine Co.actions, I like BAT models M, MB, and 3LL best. I prefer these because because of their size (large bedding footprint) smoothness, timing, options available, and last but not least visual appearance.

Trigger: I recommend and use Jewell triggers. Other good options are: Kelbly, CG Jackson (good 2-Stage) Anschutz (best 2-Stage for Bat and Kelbly actions), Bix’N Andy, and David Tubb.

Barrel: Duane made another good choice here. He decided to go with a Brux 1:8.5″-twist, 4-groove cut-rifled barrel. If you look at the F-Class and Long Range benchrest equipment lists, you will see that cut-rifled barrels are currently dominating. Many records have been shot with both button-rifled, and cut-rifled barrels. I have shot both, and prefer cut-rifled barrels. I am not saying that button-rifled barrels are not capable of shooting as well as cut-rifled barrels, but on average, in my experience, four out of five cut-rifled barrels (from top makers) will shoot well, vs. three out of five buttoned barrels. YMMV, but this is what I’ve observed.

Brux Barrels is not the only company that produces very accurate cut-rifled barrels. We know that Krieger, Bartlein, Satern, and Hawk Hill Custom all make fine cut-rifled barrels as well.

Scope: Duane’s rifle was fitted with a Nightforce 15-55x52mm Competition scope with DDR-2 reticle. This optic is ultra clear, reasonably lightweight (28 oz.), super reliable, and has 1/8 MOA clicks — what you want for long range F-Class competition. In this 15-55X NF model, I like the DDR-2 reticle best, because fine cross hairs (FCH) are hard to see in heavy mirage. The DDR-2 has a heavier horizontal line, with a center dot. March scopes are also very popular and very well-made.

.284 Win F-Class F-Open Rifle Emil Kovan Brux BAT M Master Class Bernosky

Thanks for reading, and keep ‘em in the middle…

Emil Kovan F-Class competition bio photoEmil Kovan Competition History:

– 2014 F-Class Open National Champion

– 2016 F-Class Open Canadian Championship, Silver Medal (tied for first on score)

– 2015 F-Class Open National Championship, Silver Medal

– F-Class Open National Championship Teams, 2015, 2014, 2013, Shooting Team Member

– Over 15 wins in Regional and State Championships in Palma, F-TR, F-Open

– 2013 U.S. National Team Member

– 2017 U.S. National Development Team Member

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