February 9th, 2020

Sunday GunDay: Seb’s Hammerhead Dual-Discipline Rifle

Seb Lambang 6PPC .284 Win Benchrest hammerhead

We first ran this story a few seasons back. Since then we’ve received many questions about this gun, so we thought we’d give readers another chance to learn about this truly innovative, switch-barrel “convertible” rifle. This gun works for both short-range (100/200) and long-range (500-1000 yd) benchrest matches.

Seb Lambang 6PPC .284 Win Benchrest hammerhead

You interested in a truly innovative bench gun that can shoot both short-range and long-range matches? Check out Seb Lambang’s original “do-it-all” rifle. This switch-barrel rifle combined two very different chamberings: 6 PPC and .284 Winchester. With that caliber combo, Seb’s covered from 100 yards (LV/HV mode) all the way out to 1000 (LR Light Gun mode). But the dual chambering is not the rifle’s only trick feature. Exploiting the long-range benchrest rules on stock designs, Seb has fitted a 3″-wide, flat rear metal keel to the buttstock. That counter-balances his 30″-long 7mm barrel, improves tracking, and adds stability. Seb built the stock and smithing was done by Australian gunsmith David Kerr.

Detachable Hammerhead Wing Section Plus Fat-Bottom Keel
To further reduce torque and improve tracking, the stock features an 8″-wide, detachable fore-end fixture. This “hammerhead” fore-end section has extended “wings” on both sides, making the rifle super-stable. The hammerhead unit can be removed, leaving the stock 3″ wide for use in registered benchrest matches where 3″ is the maximum width. The photos below show Seb’s gun in .284 Win Long-Range (LR) Light Gun mode, complete with front wings and rear keel.

Seb Lambang 6PPC .284 Win Benchrest hammerhead

Yes This Rig Shoots … In Both Configurations, Long-Range and Short
Seb has already used his switch-caliber, switch-barrel rig successfully in competition. Seb tells us: “The gun shot and tracked real well either in 6 PPC LV/HV mode or in .284 Win LG mode. I love it! Back in 2015, with this gun I placed Top 10 for the Two-Gun at the Harry Madden Championship in Brisbane, Australia just a few days ago and took the silver medal for the 500m Flyshoot with the .284 Win on the next day. So who says a switch-barrel rifle can’t (or doesn’t) work?” And get this, Seb finished the stock just four days before the Brisbane match. He glued-in the action the evening before the match and shot it the next day in competition. Pretty impressive we’d say….

Sebastian Lambang Hammerhead 6PPC

6 PPC and .284 Win Convertible Rifle Specifications
Action: Stolle Panda Short Action (glue-in plus front/rear alum. pillars), Right Bolt, Right Port, Right Eject, .473 bolt face.
LV/HV Weight: Rifle weighs 10.4 lbs in 6 PPC mode (no keel, no front wings).
LV/HV Barrel: Krieger 21.5″ OAL, 6mm (6 PPC, .270″ neck), 1:14″ twist.
Light Gun Weight: 15.5 lbs in .284 Mode with 3″ rear aluminum keel and 8″ fore-end attachment.
Light Gun Barrel: Maddco 30″ OAL, 7mm (.284 Win, .316″ neck), 1:9″ twist.
Metal: Home-made, one-piece scope base with +15 MOA scope rings.

Seb Lambang — Indonesian Innovator
Sebastian (“Seb”) Lambang is the designer/builder of the innovative SEB Coaxial rests, some of the best joystick rests on the market. The SEB Mini is a remarkable design — very compact but solid enough to win F-Class matches. And the SEB Neo Rest has become the go-to choice for short-range and long-range benchrest. The NEO folds flat for transport, yet offers extended vertical and horizontal travel and a rest top that can adjust from roughly 2″ wide to over 6″ in width. This Editor uses a SEB Neo for both bench and F-Class shooting and it is my favorite joystick rest. Here’s a video review of the SEB Mini, filmed at the Ben Avery Range in Phoenix:

Seb is actually in the USA right now, competing at the Berger Southwest Nationals (SWN). No he’s not shooting his radical Hammerhead at Ben Avery this year — he’s got a more conventional F-TR rig. He is shooting with the Int’l Pickup F-TR team coached by Dean Wheeler. In the 2/6/2020 Team Palma match, Seb finished with high score for his team, 438-9X.

ADDENDUM — Seb Succeeds at SWN in Sharpshooter Division:
Seb just posted this report from the Berger SW Nationals in Phoenix: “Proud to get first place in Sharpshooter Class in the Long Range Day 1 Aggregate. Super tough F-CLASS match against lots of the best shooters in the USA and some other countries. Thanks a bunch to my gunsmith Alex Wheeler who did a really great job, [providing a] super-smooth timed action. Thanks also to Tom Mousel who did a great job with the super-accurate ammo! Thanks to Will McCloskey for the best laminate wood rifle stock on the market. The rifle shoots GREAT. I really enjoy this match!”. Here is Seb on the firing line at Ben Avery. The rifle rests on the SEB Joy-Pod joystick bipod he created.

Sebastian Lambang Hammerhead 6PPC .308 Win F-TR SWN

[NOTE: The NRA has multiple divisions: High Master, Master, Expert, Sharpshooter, and Marksman. The most elite level is High Master.]

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February 9th, 2020

Technology Insight: How Carbon-Wrapped Barrels Are Made

Proof Reseach carbon fiber barrel wrap aerospace composites

Montana-based PROOF Research has released a revealing video showcasing carbon fiber firearms technology and the company’s barrel-making process. Viewers will find the 8-minute film an intriguing introduction to composite barrel-making, which employs aerospace carbon fiber wrapped around a steel barrel core. The video showcases the high-tech machines used at PROOF’s production facilities.


This video shows how PROOF Research employs aerospace-grade, high-temperature composite materials to build match-grade carbon fiber-wrapped barrels.

Proof Reseach carbon fiber barrel wrap aerospace composites

Proof Reseach carbon fiber barrel wrap aerospace composites

Dr. David Curliss, General Manager of PROOF Research’s Advanced Composite Division, and former head of the U.S. Air Force High Temperature Composites Laboratory, explains how aerospace expertise helps in the development of PROOF’s firearms-related products: “We are able to provide premier materials for PROOF Research for firearms barrels applications as well as the aerospace market. We’re probably the only firearms technology company that has composite materials in orbit around the earth.”

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