May 13th, 2012

Chad Jenkins Sets IBS 600-Yard LG Record with 1.495″ Aggregate

Piedmont Gun Club RutherfordtonThe regular, monthly 600-yard benchrest match at the Piedmont Gun Club in Rutherfordton, NC rivals a National event in terms of the quality of the shooters and the rifles. And just yesterday, a pending new IBS 600-yard, four-target Light Gun Group Aggregate Record was shot. Chad Jenkins put together a stunning 1.495″ Aggregate shooting a Light Gun with Shehane Tracker stock and Krieger barrel. Chad’s smallest group was a 1.033″. The caliber was a ‘Plain Jane’ 6mmBR. Chad’s 1.495″ Agg breaks the existing 1.6068″ record set by Sam Hall in 2011.

Sam Hall reports: “Congratulations goes out to Chad Jenkins today at Piedmont Gun Range, Rutherfordton, NC. Chad shot a 1.495″ four-target aggregate in LG this morning! The old record (1.6068″) was shot by yours truly last July. That is some kind of great shooting! Chad has been shooting great and kicking our tails for two years now. You will probabbly be hearing more from him. What I know is: he was shooting 105gr Berger VLDs (with Varget and CCI Primers) in a standard 6BR, with BAT action, ST-1000 stock, and 1:8″-twist Krieger barrel. I think it is safe to say it is a ‘hummer’!”

Piedmont Gun Club Rutherfordton

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May 13th, 2012

Lothar Walther UltraLight Barrels — Less Heat, Half the Weight

We’re excited when major barrel-makers offer new technologies that promise worthwhile performance benefits for hunters or match shooters. Lothar Walther (LW) has developed a new bi-metal barrel system that cuts weight dramatically while promising significantly-enhanced heat dissipation.

Walther’s new Ultra-Lightweight Barrels combine steel with lightweight alloys. This results in a significant weight reduction without the use of carbon fiber, epoxy binders, or other heat-retaining materials. Beginning as an LW50 stainless blank, the barrel is precision-machined to remove excess weight. An outer casing of light-weight alloys is machined and the two are fitted together without adhesives. Basically you end up with the steel inner barrel inside a larger-diameter fluted aluminum outer barrel (see diagram). This gives you the ‘best of both worlds’ — light weight for ease of carry, and thick diameter for rigidity and enhanced heat dissipation. Near the action, the barrel remains all-steel.

Lothar Walther ultra lightweight bi-metal barrel

Aluminum thermal conductivityWe haven’t tested one of these bi-metal composite barrels, but the potential for significant weight savings is obvious — aluminum is a lot lighter than steel. What’s more, a metals expert we contacted said that a bi-metal system employing fluted aluminum over steel, if assembled properly, could dissipate heat much better than steel alone (given the same diameter). Stainless steel has a thermal conductivity factor of 16. Aluminum has a thermal conductivity factor of 250.*

Our expert also pointed out that some other composite barrel systems on the market actually increase heat retention because they place insulating materials next to the inner steel barrel. (Carbon, Fiberglass, and Epoxy are all considered “insulating substances” as they have very low thermal conductivity*.) The LW system of aluminum over metal should avoid this mistake, our expert said. Lothar Walther says: “Unlike solid steel barrels, this barrel sheds heat fast. VERY FAST!”

Half the Weight of Conventional Barrels
How much weight can you save? With a 1.200″ shank diameter (except Savage) and a muzzle diameter of 0.850″, the LW Ultra-Lightweight Barrel is less than half the weight of a standard varmint barrel of the same size. Walther claims its UltraLight Barrel can be “carried for long distances and stand up to heavy firing.” This, LW says, makes these barrels “perfect… for varmint and tactical uses”.

Pre-Chambered Ultra-Lightweight Barrels Available in .22 to .338 Calibers
Lothar Walther offers Ultra-Lightweight barrels in a full range of calibers from .22LR to .338. Each Ultra-Lightweight Barrel comes complete with chamber, crown, and breech threads. These barrels are fluted by the factory. If you order a LW Ultra-Lightweight barrel, Lothar Walter provides the services of a specialist trained in building guns with these barrels. To order one of Lothar Walther’s bi-metal barrels, CLICK HERE or contact Lothar Walthar at the address below:

Lothar Walther Precision Tools, Inc.
3425 Hutchinson Rd. – Cumming, GA 30040
Phone: 770-889-9998 | Fax: 770-889-4919
E-Mail: lotharwalther [at] mindspring.com
Website: www.lothar-walther.com

*Thermal conductivity is the quantity of heat transmitted through a unit thickness in a direction normal to a surface of unit area, due to a unit temperature gradient under steady state conditions. The factor values are based on this formula: W/(m.K) = 0.85984 kcal/(hr.m. °C). Here are thermal conductivty values for common materials: Aluminum, 250; Brass, 109; Steel (Carbon 1%), 45; Stainless Steel, 16; Carbon, 1.7; Brick dense, 1.3; Concrete (medium) 0.7; Epoxy, 0.35; Fiberglass, .04.

Story tip from EdLongRange. We welcome reader submissions.
Permalink Gear Review, Gunsmithing 15 Comments »
May 13th, 2012

Savage Days in Colorado (Free Gun Tests, Free Hornady Ammo)

Readers in the Rockies region should head to the Colorado Rifle Club (CRC) range on Saturday June 2, 2012, from 9:00 am to 4:00 pm. There you can try out a variety of Savage rifles from 17 HMR all the way up to a big magnum. All Rimfire ammo is free, and your first five (5) Centerfire rounds per gun are free (except for .338 Lapua Magnum, $5 per round). Can’t beat that. This June 2 “rifle test-ride” at CRC is part of Savage’s Arms Club Program, which lets potential rifle buyers try out target and hunting rifles, both centerfire and rimfire, at no cost.

Savage Arms provides the rifles, Nikon supplies the optics, and Hornady provides free ammo for testing. Caliber options include .17 HMR, .223 Rem, 6.5 Creedmoor, .308 Win, .300 Win Mag and .338 Lapua Magnum. (For the .338 Lapua Magnum, premium Lapua ammo is $5.00 per round). If you have not shot Savage’s F-T/R or Law Enforcement Series rifles, now is your chance. We also recommend Savage’s model 93R17 TR, a .17 HMR rimfire with the look and feel of full-size centerfire rifle. The 93R17 we tested last year was very accurate and we liked the look and feel of the matte-black tactical-style stock.

Directions to Range:
The Colorado Rifle Club range is located at 76099 East 96th Ave., Byers, CO 80103. Byers is 40 miles east of Denver on l-70 at exit 316. To get to the range, travel 8 miles east of Byers on U.S. 36, then about 9 miles north on Leader Road (52N), then one mile west on 96th Ave. to the range gate, then one mile north to the ranges. CLICK HERE for map to CRC range.

Latitude and Longitude: 39° 52′ 12.58″ N, 104° 05′ 39.47″ W

Story Tip by EdLongRange. We welcome reader submissions.
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