15 « January « 2015 « Daily Bulletin

teslong borescope digital camera barrel monitor

As an Amazon Associate, this site earns a commission from Amazon sales.

January 15th, 2015

7mm Shehane — Winning Wildcat for F-Open

After we posted Erik Cortina’s video featuring the trimming of 7mm Shehane cartridges with a Giraud Power Trimmer, many of our readers asked: “What’s a 7mm Shehane? How does it differ from a standard .284 Winchester?” To answer that question, we’re reprising a “cartridge profile” we ran a couple seasons back. This talks about the qualities of the 7mm Shehane, and includes a reamer print. The 7mm Shehane is an excellent “upgrade” to the .284 Win. The added capacity may not seem like much, but it allows some Shehane shooters to reach a higher, optimal velocity node.

AccurateShooter.com .284 Shehane Wildcat Winchester F-Class

High-BC 7mm Bullets 7mm is the caliber to beat in F-Class Open Division (though many guys are looking hard at the big 30s.) With a standard .284 Winchester, or better yet, a .284 Improved, you can drive the high-BC Berger 180gr bullets to competitive velocities. A .284 Improved will shoot well inside a 6.5-284, and you’ll probably get significantly longer barrel life (at least 1800 rounds vs. as little as 1200 for the 6.5mm).

The straight .284 Win is a good cartridge, but in most barrels, it can’t push the 180s at 2900-2950 fps velocity levels*. A lot of barrels will top out at about 2850. That’s where the .284 Shehane comes into play. The .284 Shehane is a slightly modified wildcat that retains the same 35° shoulder as the parent case. However, by blowing the sidewalls out 0.010″, the .284 Shehane picks up about 3.3 grains of extra case capacity. That enhancement makes a BIG difference. The extra boiler room is enough to drive the 180s at 2900-2950 fps with H4831sc. With N560 or Reloder 17 you can go even faster.

Scotland’s Grant Taylor used the .284 Shehane to finish 3rd overall in the 2009 individual F-Class World Championships at Bisley, England. Grant reports: “I have a .284 Shehane and it’s very accurate with superb vertical spreads at 1000 yards. I have to thank Jim Hardy for putting me onto the caliber, it has awesome accuracy. I’m getting 2930-2950 fps with spreads in the 3-5 fps range. I use Hodgdon H4831sc powder, CCI BR2 primers, and pointed 180gr Bergers.”

Forum member Jim Hardy has shot the .284 with great success. He tells us: “In my humble opinion, the .284 Shehane is the best balanced long range round there is — bar none. I (perhaps_ have shot more of this chambering than anyone else, and it has proven better than I ever expected. Here is why:

You have to shoot a 30 Cal magnum with a 240gr bullet to equal the performance of most 7mm chamberings with the 180 Berger VLD. With the .284 Shehane, you have a .308 bolt face, medium action, and Lapua brass. You use less powder than the 7 mags, and have great accuracy and ballistics even while fire-forming. The .284 Shehane shoots inside the 6.5 AND the straight 284, the 300 WSM, and the 300 Win Mag with less recoil. The .284 Shehane offers twice the competitive barrel life of the 6.5-284, an easy 2950 fps with H4831 SC, [and it] can run 3000+ with N560 and Reloder 17, which is right there with the 7mm WSM. What is not to love about the 284 Shehane? It is a no-brainer for long range — F-Class or Prone or 1000-yard Benchrest.”

*Some exceptional barrels chambered in straight .284 Win can reach 2900 fps with the 180s. Ryan Pierce, who recently set a 450-24X Pending F-Open record, has a 32″ Brux barrel that is delivering 2900 fps with the straight .284. However, Ryan acknowledges that his velocities are not typical: “A lot of .284 Win barrels top out at around 2850 fps with the 180s.”

Permalink Bullets, Brass, Ammo 3 Comments »

January 15th, 2015

Load Data for Accurate LT-30 and LT-32 Powders

Western Powders LT-32 LT-30 accurate powder

Is that target good enough? Yes that’s really five (5) shots. This amazing group was shot, in competition, with 6 PPC cartridges loaded with Accurate LT-32 powder. If you’d like to try out this powder in your rifle, Western Powders has released loading data for the LT series of powders. LT-32 is a good choice if you’re currently using propellants with burn rates similar to Vihtavuori N133 or Hodgdon Benchmark powders. (Caution: NEVER simply substitute loads powder for powder. Always start low and work up when trying a new powder). The other powder in Accurate’s LT series, LT-30, has a burn rate similar to Hodgdon H4198. LT-30 is a superb performer in the 30 BR cartridge. LT-30 also is a good choice for small varmint cartridges such as the 17 Rem Fireball.

benchrest 30 BR rem remington lt-32 powder Western

Download FREE Reloading Guide for Accurate and Ramshot Powders
You can also download the complete Western Powders Reloading Guide in PDF format. This covers Accurate and Ramshot propellants.

Permalink Bullets, Brass, Ammo, Reloading 5 Comments »

January 15th, 2015

What Would SHOT Show Have Been Like in 1855?

Story by T. Logan Metesh for NRABlog.com
Since beginning in 1979, SHOT Show has become one of the premier firearms industry event of the year. As I was packing up amazing and historic guns from the NRA Museums for SHOT Show, I was led down a path of historical whimsy — what would SHOT Show have been like 160 years ago in 1855?

Treeby NRA Museum Antique Rifle All of the today’s household names in firearms would have been in attendance: Remington, Colt, Smith & Wesson, Winchester, and others. Some of them were already well established; others were on the edge of greatness. Eliphalet Remington (right) would have been there. Already a well-known and respected businessman, he would have been representing the company he founded 39 years before in 1816.

Samuel Colt would have been in very good spirits. He had just renamed his company — Colt’s Patent Fire Arms Manufacturing Company — and had broken ground on a new factory that would open the following year in 1856. His revolver patent was also set to expire in 1856. Colt had recently fired Rollin White, a trivial matter at the time, but it would come back to haunt him.

Horace Smith and Daniel Wesson would have been there, too. At this point, the now-venerable firearms company had only been a partnership for three years. They would likely have been joined by one of their investors, Oliver Winchester, and showcasing their lever-action “Volcanic” arms.

Treeby NRA Museum Antique Rifle

Very shortly, Winchester would buy Volcanic, Rollin White would patent a bored-through cylinder that Colt had rejected, and Smith and Wesson would form Smith & Wesson Revolver Company utilizing White’s new patent.

As you can see, many of the technologies we consider antiquated were, at the time, revolutionary. Some of the designs we take for granted today were in their infancy in 1855.

Other lesser-known (and less successful) gunmakers hoping to capitalize on their new products would have been there as well. After all, there’s no better place to unveil new designs than at SHOT Show!

Thomas Wright Gardener Treeby (often known as T.W. Treeby) would likely have been at SHOT Show displaying his new 14-shot, .54 caliber chain rifle. Designed in 1854 and patented in 1855, these rifles were made in an attempt to create a successful repeating rifle design. The British military tested the gun with a 30-round chain, but the idea never caught on.

Treeby NRA Museum Antique Rifle

Rare, Antique Firearms on ForgottenWeapons.com
See the Treeby Chain Gun and other rare firearms on ForgottenWeapons.com. It is believed that only two Treeby Chain rifles were ever made. The 14 chain-linked “chambers” rotated into place via a sprocket (like on a bicycle), and each had a separate percussion cap. Watch this ForgottenWeapons.com video to see how it worked.