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July 8th, 2016

Tubb T7T Two-Stage Trigger for Rem-Clone Actions

David Tubb two-stage 2-stage T7T trigger Rem 700 Remington clone high power

Multi-time National High Power champion David Tubb has developed an impressive two-stage trigger for Remington 700 rifles, the Model T7T. Priced at $385.00, the T7T Trigger is a true two-stage design: first and second stages are independently adjustable for both weight and feel. Overall (combined stage) trigger pull weight can be adjusted from just under 1 pound to slightly over 3.5 pounds.

The new T7T is a quality product. We’ve used the T7T and it proved crisp, repeatable, and reliable. If you are looking for a two-stage trigger for a precision rifle, this is a good option. We like a two-stage trigger for PRS applications, and the T7T can be adjusted high enough for that role. Or, it can go all the way down to under a pound — low enough to suit most F-Class shooters.

If you are interested in the T7T, watch these two videos. The first shows how to adjust pull-weights for both stages. The second video shows how to modify your stock to provide clearance for the T7T.

This video shows how to adjust the new Tubb T7T two-stage trigger for Remington 700s:

T7T Trigger Installation Tips
While installation of the T7T may require minor modifications to your action, most gun owners with basic mechanical skills can install the T7T by themselves. Note: As installed, the T7T trigger (either Right-Hand or Left-Hand) also requires a companion T7T bolt release, which you can get from DavidTubb.com for $10.00.

David Tubb two-stage 2-stage T7T trigger Rem 700 Remington clone high power

This video shows how to modify your stock to fit the T7T trigger:

Permalink Gear Review, Gunsmithing 1 Comment »
May 8th, 2016

Polly Tubb… Talented Shooter and Mother of a Champion

Pauline Polly Tubb David Tubb NRA High Power Championship Champion

Since this is Mother’s Day, here’s a story about one very special mother — a talented lady shooter who also reared one of the greatest marksmen in history, David Tubb.

Pauline Polly Tubb David Tubb NRA High Power Championship ChampionWe expect you’ve heard of David Tubb, 11-time NRA National High Power Champion. Without question, David is one of the greatest rifle shooters who ever lived. What you may not know is that David came from a family of shooters. David’s father, George Tubb, was a nationally-ranked High Power competitor. What’s more (now this may surprise you), David’s mother “Polly” was was a great shooter in her own right. When she wasn’t rearing a future Champion, Polly was hitting the X-Ring at rifle matches.

Pauline (“Polly”) S. Tubb of Canadian, Texas, earned several rifle championships during the course of her shooting career. In this photo, Polly took a moment to appear for a photo after winning the 1962 National Woman’s Bolt Rifle championship at Camp Perry. One shooter who competed against Polly observed: “I was there as a 1962 Pennsylvania State Team junior! I remember Polly. She beat some of the best Army and Marine shooters and always did it with style and good humor.”

Archive photo courtesy Civilian Marksmanship Program, TheCMP.org.
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April 24th, 2016

Tubb T7T Two-Stage Trigger for Remington-Type Actions

David Tubb two-stage 2-stage T7T trigger Rem 700 Remington clone high power

You probably know by now that David Tubb has introduced a new two-stage trigger for Remington 700 rifles, the Model T7T. Priced at $385.00, the new T7T Trigger is a true two-stage design: first and second stages are independently adjustable for both weight and feel. Overall (combined stage) trigger pull weight can be adjusted from just under 1 pound to slightly over 3.5 pounds.

If you are interested in the 7ZT, watch these two videos. The first shows how to adjust pull-weights for both stages. The second video shows how to modify your stock to provide clearance for the T7T.

This video shows how to adjust the new Tubb T7T two-stage trigger for Remington 700s:

The new T7T is a quality product. We’ve received good feedback from “early adopters” who tell us the two-stage function works well. While installation of the T7T may require minor modifications to your action, most gun owners with basic mechanical skills can install the T7T by themselves. The T7T is made using stainless steel and aluminum for maximum corrosion resistance. Note, installation of the T7T trigger (either Right-Hand or Left-Hand) also requires a companion T7T bolt release, offered by DavidTubb.com for $10.00.

David Tubb two-stage 2-stage T7T trigger Rem 700 Remington clone high power

This video shows how to modify your stock to fit the T7T trigger:

Permalink Gear Review, Gunsmithing No Comments »
February 11th, 2016

Three National Champions Reveal How to Read the Wind

Blast from the Past: As we get set up in Phoenix for the 2016 Berger Southwest Nationals, we thought we’d revisit one of our more interesting features from a few years back. At the 2010 SHOT Show, we had the unique opportunity to corner three “superstars” of High Power shooting, and solicit their wind-reading secrets. Carl Bernosky, David Tubb, and John Whidden all shared some championship-caliber wind wisdom in video interviews. If you shoot competitively, you’ll want to watch these videos. David’s video is worth watching twice because some of the key points he makes go by pretty quickly.

In the three videos below (in alphabetical order), Carl Bernosky (10-Time Nat’l High Power Champion), David Tubb (11-time Nat’l High Power Champion and 7-time Nat’l Long-Range Champion), and John Whidden (2-Time Nat’l High Power Long-Range Champion) shared some of the wind-doping strategies that have carried them to victory in the nation’s most competitive shooting matches. This is GOLD folks… no matter what your discipline — be it short-range Benchrest or Long-Range High Power — watch these videos for valuable insights that can help you shoot more accurately, and post higher scores, in all wind conditions.

YouTube Preview Image YouTube Preview Image YouTube Preview Image

We were very fortunate to have these three extraordinarily gifted champions reveal their “winning ways”. These guys REALLY know their stuff. I thought to myself: “Wow, this is how a baseball fan might feel if he could assemble Babe Ruth, Hank Aaron, and Ted Williams in the same room, and have them each reveal their hitting secrets.” Editor’s Note: These interviews were conducted before Bernosky and Tubb won their most recent National Championships.

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December 17th, 2015

Top Ten Holiday Gift Books for Precision Shooters

AccurateShooter Christmas Book List recommended shooting books

Christmas Day is just a week away. Books have always been popular holiday gifts. If you haven’t completed your holiday shopping, here are some recommended titles that should please the serious shooters and firearms enthusiasts on your shopping list. For shooting clubs, books also make great end-of-season member awards. Most of us would rather have a useful book than one more piece of wood to toss in a box in the closet.

Here Are TEN TITLES Recommended for Serious Shooters:

Modern Advancements in LR Shooting
by Bryan Litz, $27.99 (Kindle), $43.95 (Hardcover)

If you’re a serious long-range shooter, consider adding this book to your library. Relying on extensive ballistics testing, Modern Advancements contains some fascinating research results, including the effects of twist rate on muzzle velocity, BC, and precision. Other sections detail the evolution of modern rifle, bullet, and optics designs. And there is an important comparison test of chronographs. Laser rangefinders and wind measurement devices are explained in detail by contributing author Nick Vitalbo. This book is a valuable resource for anyone who wants to understand the current “state of the art” in today’s shooting world. There is a ton of “hard science” in this book — not just opinions.

mike ratigan book Extreme Rifle Accuracy
by Mike Ratigan, $35.65 (Softcover)

This book should be on the shelf of every short-range benchrest shooter. (Shooters in other disciplines will find the book helpful as well.) Butch Lambert says Mike’s book is “far and away the best Benchrest book written. Very comprehensive, it touches on every aspect of our game.” Mike’s 368-page book is dedicated to getting the most from modern rifle accuracy equipment with an emphasis on shooting 100-200-300 yard group benchrest tournaments. This book covers the most popular hardware plus new equipment offerings are covered, including external mount scopes, actions, triggers, stocks, wind flags, and more. Also covered are rifle handling techniques, note taking, tuning, bullet selection, goals, and match strategies. Mike provides many tips that will help active competitors update their own competitive program.

Nancy Tompkins Long Range book Prone and Long-Range Rifle Shooting
by Nancy Tompkins, $45.00, (Hardcover, 2d Edition).

Nancy Tompkins is one of the greatest long-range shooters in American history. She has won five National Long-range Championships. Tompkins’ treatise is a must-read for serious Palma, F-Class, and High Power shooters. The revised Second edition includes F-Class equipment and techniques, and newly updated information. Color pictures. Topics include Mental & Physical training, Reading Wind & Mirage Shooting Fundamentals, International Competition, and Loading for Long Range. Nancy Tompkins is a 4-time winner of the National Long Range Championships, and has won countless other major events. Nancy has been on six Palma Teams (as both a shooter and a coach).

Tony Boyer Book rifle accuracy benchrest The Book of Rifle Accuracy
by Tony Boyer, $34.50 (Softcover); $42.50 (Hardcover).

Tony Boyer, the most successful shooter in the history of short-range benchrest competition, shares many of his match-winning tips in this 323-page book. The book covers all aspect of the benchrest discipline: loading, windflags, rest set-up, addressing the rifle, and match strategies. This is a high-quality publication, filled with valuable insights. Every serious benchrest shooter should read Tony’s book. Boyer has dominated registered benchrest in a fashion that will never be duplicated, having amassed 142 U.S. Benchrest Hall of Fame points. The next closest shooter, Allie Euber, has 47 Hall of Fame points. This handsome, full-color book is 323 pages long, with color photos or color illustrations on nearly every page.

David Tubb High Power Rifle The Rifle Shooter
by G. David Tubb, $34.95 (Softcover)

This book by 11-time National High Power Champion David Tubb focuses on position shooting and High Power disciplines. Section One covers fundamentals: position points, natural point of aim, breathing, triggering mechanics and follow-through, sling selection and use, getting started, getting better, avoiding obstacles. Section Two covers mechanics of offhand, sitting, and prone positions. Section Three covers shooting skills, including wind reading and mental preparation. Section Four covers the technical side of shooting, with extensive disuctions of rifle design, load development, reloading barrel maintenance, and rifle fitting. We consider this book a “must-read” for any sling shooter, and there is plenty of good advice for F-Class shooters too.

Miller Cunningham Wind Book The Wind Book for Rifle Shooters
by Linda Miller and Keith Cunningham, $21.58 (Softcover).

Many of our Forum members have recommended The Wind Book for Rifle Shooters by Linda Miller and Keith Cunningham. This 146-page book, published in 2007, is a very informative resource. But you don’t have to take our word for it. If you click this link, you can read book excerpts on Amazon.com. This lets you preview the first few chapters, and see some illustrations. Other books cover wind reading in a broader discussion of ballistics or long-range shooting. But the Miller & Cunningham book is ALL about wind reading from cover to cover, and that is its strength. The book focuses on real world skills that can help you accurately gauge wind angle, wind velocity, and wind cycles.

Harold Vaughn Accuracy Book Rifle Accuracy Facts
by Harold R. Vaughn, (Softcover and Hardcover, Used Price Varies)

Decades after it was written, Vaughn’s work remains a seminal treatise on accuracy. Vaughn was a serious scientist, working for the Sandia National Laboratories. Many “gun writers” toss out hunches about rifle accuracy. Vaughn, by contrast, did serious empirical testing and statistical analysis. Vaughn wondered why some guns shot well while seemingly identical rifles did not. Rifle Accuracy Facts covers a wide variety of topics, including internal ballistics, chamber design, barrel vibration, bullet imbalance, external ballistics, scope design and more. Writer Boyd Allen notes: “If you are serious about precision shooting, Vaughn’s book belongs in your library.”

Warren Page Book the AccurateRifle The Accurate Rifle
by Warren Page, $14.95 (Softcover), $20.99 (Hardcover)

We include this book in our list because it is an older classic that has been out of print for a while. Warren Page was the shooting Editor of Field & Stream magazine for 24 years. Long out of print, this seminal work on rifle accuracy was republished in 1996 with an updating chapter by Dave Brennan, long-time Editor of Precision Shooting magazine. If you are interested in the progress of rifle accuracy, it is worth reading this book to see how technology has developed over time (and what older methods still work today). This would make a great gift for an older shooter who grew up reading Warren Page articles in Field & Stream.

Boelter Book Rimfire Rifleman’s Guide to Rimfire Ammunition
by Steven Boelter, $29.95 (Softcover)

Steven Boelter’s 352-page book is a comprehensive study of all types of rimfire ammunition (including 17s and 22 mags), with over 600 photos. In a remarkable undertaking, Steven Boelter fired every brand and sample of rimfire ammo he could acquire (including .22 LR, 17 Mach 2, 17 HMR and .22 WMR), and recorded all the results. In all, Steven tested 11 brands and 137 different rimfire rounds, firing over 32,000 test rounds.

The Art of Rimfire Accuracy
by Bill Calfee, $9.99 (Kindle), $41.82 (Softcover)

Always controversial, Bill Calfee is nonetheless a major player in the world of rimfire accuracy. Calfee-built rimfire rifles have set many records and won many titles. He harbors strong opinions about what works and what doesn’t, but if you are involved in rimfire competition you should read this book. This work covers all aspects of rimfire gunsmithing and accurizing: barrels, tuners, chambering, triggers, stock design, bedding, action design and much more. He examines each aspect of rimfire accuracy discussing all of the components and their contribution to the improved accuracy. We don’t agree with all of Calfee’s theories about accuracy, but this book still remains a “must-read” for those serious about precision rimfire shooting.

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August 29th, 2015

Attendee Registration Now Open for 2016 SHOT Show

SHOT Show Registration 2016 Las Vegas sign up attendee

Headed to Vegas next January for SHOT Show? Then get yourself registered. Registration for the National Shooting Sports Foundation’s 2016 SHOT Show is now open for attendees. (Registration for members of the press will open in September.) The upcoming SHOT Show is slated to run January 19-22 in Las Vegas. Attendees can register now at ShotShow.org. While registering, attendees can also enroll in SHOT Show University and other seminars. CLICK HERE for Attendee Registration.

NOTE: We recommend you consider making your hotel arrangements very early. Like last year, there will be a number of major events in Las Vegas the same week as SHOT Show 2016. This means that hotel space will be heavily booked in advance. Forewarned is forearmed!

SHOT Show Sampler

In case you’ve never attended SHOT Show, here are two video highlights from last year. These two videos, created by our friends Ed and Steve, aka the 6.5 Guys, cover new-for-2015 Nightforce scopes and David Tubb’s recently released two-stage trigger.

Nightforce Optics

Nightforce showcases its F1 First Focal Plane scopes, including the new ATACR™ 5-25x56mm F1™ riflescope. With a 34mm maintube, the new 5-25x56mm F1 boasts an impressive 30 MOA of elevation per revolution, with 120 MOA of total elevation adjustment.

David Tubb

11-Time National High Power Champion David Tubb displayed his new T7T 2-stage trigger for Remington 700 actions, a major upgrade over the factory trigger. First stage and second stage are separately adjustable. Price is $350.00 for right- or left-hand versions at DavidTubb.com.

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August 2nd, 2015

Nancy Tompkins Wins 2015 NRA Long Range Championship

Michelle Gallagher Mid Tompkins Nancy Tompkins Brandon Green

The matriarch of American Long Range Shooting has done it again. The amazing Nancy Tompkins won the 2015 NRA Long Range Championship with an impressive performance. This marks the fifth time Nancy has won the LR Championship. This year’s LR match went down to the wire after many days of shooting. It all came down to X-Count, with two talented ladies tied for score. Shooting a 1242-58X over the multi-day competition, Nancy finished four Xs ahead of SSG Amanda Elsenboss (1242-54X). Both women dropped only 8 points out of 1250 possible. Amanda’s USAMU team-mate, SFC Brandon Green, finished third, one point back, at 1241-75X. SFC Green, the newly-crowned 2015 High Power National Champion, had high X-Count by a wide margin.

CLICK HERE for Complete 2015 NRA Long Range High Power Rifle Championships RESULTS.

This year’s Long Range Championships event was hugely popular, with 321 competitors on the match roster. Many familiar faces ranked among the Special Award winners. Our friends David Tubb (1241-69X) and Jim O’Connell (1235-66X) were High Senior and High Grand Senior, respectively. Tubb finished fourth overall, with the second-highest X-Count. There were also talented newcomers, such as High Junior Charlotte Flanagan, a young Kiwi from far-away New Zealand. Firing a 1236-40X, Charlotte is shooting at an extremely high level for someone so young. As Ken Littlefield noted: “It’s pretty impressive to come into Camp Perry for the first time and win the Junior Championship!” Charlotte could be formidable at the World Fullbore LR Championships slated for 3-9 August at Camp Perry.

Here are the overall Top 10 finishers. Note that Michelle Gallager, Nancy Tompkins’s daughter, made the Top 10, making this a “family affair” for the Tompkins/Gallagher clan:

1. NANCY TOMPKINS (1242-58X), HM, Div. B – U.S. Match ‘Any’ Rifle*, Rule 3.2, 3.7(c)
2. SSG AMANDA ELSENBOSS (1242-54X), HM, USA REG W Div. B – U.S. Palma Rifle, Rule 3.3.1(a)
3. SFC BRANDON GREEN (1241-75X), HM, USA REG Div. B – U.S. Palma Rifle, Rule 3.3.1(a)
4. DAVID TUBB (1241-69X), HM, Div. B – U.S. Palma Rifle, Rule 3.3.1(a)
5. DAVID CALVERT (1241-63X), MA, Palma Rifle (NRA Rule 3.3.3 (b))
6. JANE MESSER (1240-60X), HM, Palma Rifle (NRA Rule 3.3.3 (b))
7. DAVID LUCKMAN (1239-68X), MA, Palma Rifle (NRA Rule 3.3.3 (b))
8. SGT DICONZA (1238-59X), HM, USMC REG Div. B – U.S. Palma Rifle, Rule 3.3.1(a)
9. PHILLIP CROWE (1238-54X), HM, Div. B – U.S. Palma Rifle, Rule 3.3.1(a)
10. MICHELLE GALLAGHER (1237-64X), HM, Div. B – U.S. Palma Rifle, Rule 3.3.1(a)
*The NRA Match bulletin lists Palma Rifle, but Nancy said she shot her “Any Rifle”.

In this photo, Michelle Gallagher is missing … but someone had to take the photo.
Michelle Gallagher Mid Tompkins Nancy Tompkins Sherri Jo Gallagher

Here is Nancy with the Tompkins Trophy. And yes, if you are wondering, that trophy was donated, decades ago, by hubby Mid Tompkins as the top prize for the Long Range High Power Rifle competition.

Nancy Tompkins Long Range Championship
Photo courtesy NRABlog.com.

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January 24th, 2015

SHOT Show: Nightforce, Manners, David Tubb, G.A. Precision

Our friends Ed and Steve, AKA the 6.5 Guys were in Las Vegas this week, checking out new products at SHOT Show. Ed and Steve visited some of our favorite gear-makers, including Nightforce Optics, Manners Composite Stocks, David Tubb, and G.A. Precision. Here are Ed and Steve’s Show reports for these important vendors. You can see more SHOT Show videos by Ed and Steve at 6.5Guys.com.


Nightforce Optics

Highlights include Nightforce’s new F1 First Focal Plane scopes. Our readers will probably be most interested in the new ATACR™ 5-25x56mm F1™ riflescope. With a beefy 34mm maintube, the new 5-25x56mm F1 boasts an impressive 30 MOA (or 12 Mil-Rads) of elevation per revolution, with 120 MOA (or 35 mils) of total elevation adjustment.


Manners Composite Stocks

There are about a half-dozen new stocks from Manners for 2015, both for precision long-range shooters as well as hunters. In the video Tom Manners shows a new tactical folder and the T7 Hybrid, an older design that Tom brought back by popular demand.

SHOT Show Tom Manners Composite Stock 6.5 Guys


David Tubb

11-Time National High Power Champion David Tubb displayed his new T7T 2-stage trigger for Remington 700 actions. This is an impressive new component that is a major upgrade over the factory trigger. First stage and second stage are separately adjustable. Price is $350.00 for right- or left-hand versions at DavidTubb.com.

SHOT Show 6.5 Guys David Tubb 2-Stage Trigger


G.A. Precision

George Gardner, founder of G.A. Precision shows off the impressive new Tempest Action, and talks about trends in the world of tactical competition. Shown below is a black-finish Tempest in a rifle at G.A.P.’s booth.

SHOT Show 6.5 Guys David Tubb 2-Stage Trigger

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October 25th, 2013

Polly Tubb — A Lady Champion Who Raised a Champion

Pauline Polly Tubb David Tubb NRA High Power Championship ChampionWe expect you’ve heard of David Tubb, 11-time NRA National High Power Champion. Without question, David is one of the greatest rifle shooters who ever lived. What you may not know is that David came from a family of shooters. David’s father, George Tubb, was a nationally-ranked High Power competitor. What’s more (now this may surprise you), David’s mother “Polly” was was a great shooter in her own right. When she wasn’t rearing a future Champion, Polly was hitting the X-Ring at rifle matches.

Pauline (“Polly”) S. Tubb of Canadian, Texas, earned several rifle championships during the course of her shooting career. In this photo, Polly took a moment to appear for a photo after winning the 1962 National Woman’s Bolt Rifle championship at Camp Perry. One shooter who competed against Polly observed: “I was there as a 1962 Pennsylvania State Team junior! I remember Polly. She beat some of the best Army and Marine shooters and always did it with style and good humor.”

Now that’s our kind of gal. God Bless you Polly. Thanks for being a Leading Lady of our sport.

Pauline Polly Tubb David Tubb NRA High Power Championship Champion

Archive photo courtesy Civilian Marksmanship Program, TheCMP.org.
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August 7th, 2012

NRA High Power Championship Events Commence Today

Report by By Kyle Jillson for the NRA Blog
Four days of NRA individual High Power shooting began this morning as shooters started their long race for the prestigious Mumma Trophy. Weather is slated to be another perfect day with clear skies and temperatures not getting too hot. In 2011, Carl Bernosky won his ninth High Power title after shooting a 2393-160X. Will Carl make it an even ten this year? Maybe a new shooter will take top spot on the podium in 2012?

Carl Bernosky High Power Camp Perry

Today’s matches are the NRA Member’s Trophy, Scott Trophy, and Coast Artillery Trophy. The Scott Trophy Match is shot rapid fire from 200 yards in the sitting/kneeling position while the Coast Artillery Match is a 300-yard rapid-fire event shot prone. The Member’s Trophy match is shot slow fire from 200 yards in the standing position.

Early Match Results
The preliminary results for the Member Trophy and Scott Trophy matches are in. The first and second relays for the three matches are all wrapped up. Previous High Power National Champions Sherri Gallagher (2010), Carl Bernosky (2011) and David Tubb (most recent 2003) all took part in relay one. The results posted below are preliminary. The scores for relays three and four are still be recorded and tabulated at this time. With all matches expected to end around 3:00 pm, the NRA Blog will provide updates from the NRA High Power Championships in Camp Perry as they become available.

Members Trophy Match
1. Sherri Gallagher 199-5X
2. Carl Bernosky 198-9X
3. Tyrel Cooper 198-5X
4. Gus Dunfey 198-5X
5. Brandon Green 197-10X
Scott Trophy Match
1. Carl Bernosky 200-18X
2. David Tubb 200-18X
3. Sara Rozanski 200-16X
4. Tyrel Cooper 200-15X
5. Rodrigo Rosa 200-14X
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August 3rd, 2012

“Dream Strong” Video Spotlights SGT Sherri Jo Gallagher

SGT Sherri GallagherThe NRA High Power National Championships begin in just a few days. One of the favorites this year is SGT Sherri Jo Gallagher, who won the High Power Title in 2010. Sherri is only the second women in history to win the National High Power Championship. The first was her mother, Nancy Tompkins. Sherri looks forward to the challenge of competing against the likes of defending champ Carl Bernosky, and past title holders Norman Houle, and David Tubb. Count on Sherri to turn in a strong performance at Camp Perry this year.

Along with competitive rifle shooting, Sherri has other important duties as a member of the U.S. Army Marksmanship Unit (USAMU). Sherri, the 2010 U.S. Army Soldier of the Year, helps train other service men and women in shooting skills. In the video below, Sherri explains her duties with the USAMU. She is proud of the role the USAMU plays in training U.S. Army soldiers.

‘Army Strong’ is a way to show that the Army is going to make you a better person. It’s going to turn you into a much better version of yourself — that you didn’t even know could exist. ‘Dream Strong’ to me would be setting high goals for yourself, and doing what it takes to achieve them. There are things I’ve done in the Army that I’ve never dreamed I could do. I’ve always wanted to be a good leader — to teach others the [marksmanship] skills that I have used my whole life. It’s incredibly gratifying. — SGT Sherri Jo Gallagher

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April 3rd, 2012

Comparative Specs for Various 6XC Brass Sources

GS Arizona, a top small-bore and centerfire shooter, uses the 6XC cartridge in some long-range matches. He has tried a variety of different types of brass for this cartridge, including necked-up 22-250 brass and Norma 6XC brass from David Tubb’s (Superior Shooting Systems). German’s measurements reveal significant differences in water capacity, as well as neck-wall thickness.

6XC Source Brass Dimensions

Case Capacity and Pressure Issues
GS has noted significant variances in capacity among the different “flavors” of brass. Norma-headstamp 6XC brass has 49.3 grains of H20 capacity, while Norma 22-250 brass holds only 47.8 grains of H20. Third-generation Tubb-brand 6XC brass is somewhere in the middle, with 48.6 grains of capacity. The tester did not have a chance to measure the high-quality Lapua 22-250 brass introduced in 2010. NOTE: These differences in case capacity are large enough that you MUST adjust your load to the brass type.

Norma 6XC brass David Tubb

We ran a 6XC QuickLOAD simulation with 115gr bullets and H4350 powder. QuickLOAD predicted that the observed difference in case capacity can result in pressure differentials as much as 4,500 psi! In other words, if you switch from Norma 6XC brass to a lesser-capacity brass type, your pressures could rise 4,500 psi (using H4350 and 115gr bullets).

We recommend sticking with the Norma 6XC brass. It is available from DavidTubb.com for a reasonable $69.00 per 100 cases. These days, that’s cheaper than many other types of premium imported cartridge brass.

Neck Thickness and Chambering Issues
German noted that the different types of available brass varied quite a bit in neck-wall thickness — from 0.0121″ (Norma 22-250) to 0.0140″ (Tubb 3rd Gen). Consequently the diameter of loaded rounds also varied. Depending on the brass you chose, your loaded rounds could be 0.267″ at the neck or 0.271″ (with no-turn brass). That’s a huge difference and it’s something you need to take into account when you have your chamber cut for a barrel. For a cross-the-course rifle, you might want a chamber with at least .003″ total clearance over a loaded round. Obviously, to achieve that clearance, you’ll need to set chamber dimensions base on your preferred type of brass.

NOTE: The research for this story was conducted in 2010. Dimensions may have changed with more recent production, so you should double-check the case capacity of your own 22-250 or 6XC brass.

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