The Berger Southwest Nationals, one of the biggest shooting events west of the Mississippi, kicks off next week at the Ben Avery Range near Phoenix, Arizona. The event begins with a Shooting Clinic on Tuesday, February 4, and concludes with 1000-yard Matches on Sunday the 9th. The host Desert Sharpshooters Club, and the staff at Berger Bullets, are working very hard to make this the best SW Nationals ever. And if you are interested, there is still time to register. Berger tells us: “It’s not too late to sign up for the 2014 Southwest Nationals! The match runs from Feb. 4-9 at the Ben Avery Shooting Facility. We have a great schedule and prizes.” The weather will be good (it was 74° in Phoenix yesterday), and there will be thousands of dollars of gear on the Prize Table. If you want to join the fun, download the entry form below, and, as soon as you can, send an email to michelle.gallagher [at] bergerbullets.com.
The Berger Southwest Long Range Nationals are held every February at the Ben Avery Shooting Facility just north of Phoenix, Arizona. Berger has partnered with the Desert Sharpshooters Rifle Club and the Arizona Game and Fish Department, resulting in a “must attend” event for long range shooters around the world.
Ben Avery is a truly world-class facility, with 98 firing points, carefully maintained firing lines and plenty of wind flags. As the match sponsor, Berger provides the “extras” – ice chests full of drinks on the firing line, a banquet on Saturday night and awards to the winners, including over $3,500 in cash prizes and over 30,000 bullets in awards.
Berger’s customers said “Make more bullets!”, and the company listened. Over the next few months Berger will more than double its capacity, by adding SIX new bullet-making machines, up from five at the beginning of 2013. You can do the math: 5 + 6 = 11. That means that Berger will have more than twice as many machines turning out bullets for the yellow and orange boxes. Bringing six new machines online represents a major commitment by Berger to increased production. This has been the “number one priority” for the company according to Berger ballistician Bryan Litz.
Bryan explained that Berger has already increased its output in recent months. In 2013 Berger produced 45% more bullets than in 2012. That’s a big boost. But, Bryan added, even with that 45% greater output, demand was out-stripping supply. So Berger determined the best long-term solution was to increase production capacity… and that meant acquiring new bullet-making machines. So 2014 will mark the “Rise of the Machines” at Berger, and that’s good news for fans of Berger Bullets. Within a few months you should see much greater availability of Berger bullets at gun stores and online vendors.
Bryan Litz Explains That Berger is Doubling Production Capacity This Year (SHOT Show Report)
Unlike Cracker Jack, there’s not a “prize in every box”. But you just might find a little something special in one of your yellow (or orange) boxes of Berger Bullets. That’s right, Berger Bullets has included some Free Bullets Coupons in randomly selected boxes of bullets. You might be a lucky fellow and score some free bullets. Forum member Ron B (aka “Snakepit”), found a nice surprise recently in a box of Berger 6mm 105gr Hybrids:
“I just opened up a new box of Berger Bullets and inside was a yellow tag that said ‘~WINNER~ You have won FREE Berger Bullets’. I called the number on the tag and gave them the Validation Code. The representative said I’d won three (3) boxes of the Berger Bullets of my choice. He said I had one of the best coupons Berger put in the boxes at random. So I now have three, 100-ct boxes of 6mm 105gr Hybrid Target Bullets coming to me from Berger’s next production run. Thank You Berger!”
Praise for Berger Bullets Prize Promotion
Forum member AndyT likes the Prize Program: “Nice to hear that some reloading companies are thinking of the civilian shooters. Well done Berger — keep it up and nice one to the winners.”
Fellow Forum member agr516 agrees: “Good to see a company who has all the demand in the world to sell their products think enough of their customers to give them something back to show their appreciation. Well done, Berger!”
As a member of the World Champion Team USA F/TR squad, Paul Phillips regularly competes (and wins) at 1000 yards. Paul is also a long-range hunter. Here’s his story about developing his ultimate long-range hunting rifle. Chambered for the .338 Lapua Magnum, this rig is accurate out to 1800 yards.
The Long-Range ChallengeBy Paul Phillips
Being an avid big game rifle hunter, my goal was to build the most accurate long-range hunting rifle possible that would still be light enough to carry. My thought was to use the same type of high-quality components as what I used on my US F/TR Team Rifle, except in a bigger caliber — a caliber that would have plenty of knock-down power at very long ranges. After extensive research, including both ballistic data analysis, as well as discussion with top gunsmiths and champion long-range shooters, I chose the .338 Lapua Magnum. My past experience from being a member of a USMC Scout Sniper Platoon and a shooting member of two World Champion U.S. F-Class F/TR teams, I knew that this rifle was more than capable of performing the task. After establishing that the rifle had half-MOA accuracy at 600 yards, we wanted to see how far the rifle could maintain sub-MOA accuracy, to see what the cartridge and rifle could achieve. Could this gun shoot sub-MOA at a mile? That was our challenge.
Rifle Components and Gunsmithing
My rifle was built on a Stiller Tac-338 single-shot action. It has a 30″, 1:10″-twist Brux barrel, a McMillan A-5 stock with Magnum fill, a Sinclair Bipod, and a Remington X-Mark trigger set at two pounds. The rifle wears a Nightforce NXS 8-32x56mm scope in Nightforce rings on a +40 MOA rail. I chose David Tooley to install the barrel, custom brake, apply a Cerakote dark earth finish and bed the stock. After speaking with Mr. Tooley in great length, I chose his no-neck-turn match .338 Lapua chamber specifically designed for the 300 grain Berger Bullet. This rifle weighs 17 pounds and, with the muzzle brake, it recoils like a standard .308 Winchester.
Load Development and Accuracy Testing
I used the 600-yard range at the Midland County Sportsman’s Club. If I was going to have any chance of hitting small targets at a mile, I would need to find a load that could produce half-minute (0.5 MOA) or better accuracy. I found an accurate load that gave me consistent half-minute groups that chronographed at 2825 FPS. My load consisted of Lapua brass, Federal 215M Primer, Alliant Reloder 25, and Berger 300gr Hybrid OTM bullet. With the Berger 300-grainer’s listed 0.419 G7 BC, this load would be good enough to reach 1880 yards before going subsonic. This load’s calculated energy at one mile is 960 ft/pounds. This is similar to a .44 magnum pistol round at point-blank range.
With my +40 MOA scope rail, my 100-yard zero ended up with the elevation at the bottom of the tube and the windage just 2 MOA left of center. This left a full 65 Minutes of Elevation — enough to get out to 1800 yards. This gave me the capability to aim and shoot from 100 yards to 1800 yards with a projectile that is still supersonic at 1800.
Hitting a 10″ Balloon at One Mile
For a one-mile target, I chose a balloon inflated to 10″ in diameter. The balloon would be a challenging, reactive target that would show up well on video. I teamed up with a fellow long-range shooter, John Droelle and friend Justin Fargo to attempt this feat. Using my known 600-yard Zero, my ballistics program showed my come-up for 1783 yards to be 53 MOA. After two sighters that measured 4 inches apart, I adjusted up one minute from my spotter shot and nailed my 10″ balloon at one mile. This video was recorded with my iPhone attached to my 25-power Kowa spotting scope, so it may seem a lot closer than it really is. Below is a video of the shot. Needless to say I achieved my goal and was very excited.
Watch Hit on 10″-Diameter Balloon at One Mile with .338 Lapua Magnum
After my balloon shot, I let my friend Justin Fargo, a novice shooter, try his skills. Justin told me that he had never shot past 100 yards using a common deer rifle. Surprisingly, Justin not only kept all his shots under 1 MOA, he hit the 9-inch white circle in the middle of the target. This bullet hole measured only 4.3 inches from the center of where he was aiming. Truly amazing! The target below shows Justin’s shots at one mile. Note that All the hits are located within the 24-inch black circle.
What I Learned — With the Right Equipment, Even a Novice Can Make Hits at a Mile
The above results demonstrate that even a novice shooter with a high-quality, custom rifle and match-grade ammo can make extreme long range shots with great accuracy. It is very important to understand the ballistics of the bullet and the effect of wind drift to make precision, first-shot hits on your target. It is also important that you know your target, backstop and beyond when making these shots. To date, I have shot approximately 40 shots at a mile in calm conditions while averaging 3-shot groups between ½ to 1 MOA (1 MOA is about 18.5″ at that distance). My next experiment is to see how well these bullets perform traveling at subsonic speeds out to 1.5 – 2 miles. Stay tuned!
Special thanks to the following people that helped out with this project: Geoff Esterline, David Tooley, Dick Davis, John Droelle, Ray Gross and Bryan Litz.
Editor’s Comment: The point of this article is to show the kind of accuracy a precision rifle system can achieve, consistently, at extreme long range. Though this rifle will do duty as a hunting arm, Phillips is not advocating that a .338 LM be used to harvest animals at the full limit of its supersonic range. Because winds are hard to predict at extreme long range in a hunting situation, Phillips cautions that the practical distance at which he would shoot game with a rig like this is much, much shorter.
A new ammunition manufacturer has started up in Stevensville, Montana. ProGrade Ammunition will be offering a wide spectrum of ammo products, with components selected for particular types of shooting. Prograde will eventually offer nine separate types of pistol and rifle ammunition: Defense Grade, Varmint Grade, Cowboy Grade, Hunter Grade, Bear Grade, Range Grade, Match Grade, Safari Grade and Tactical Grade. Our readers will probably be most interested in the “Match Grade” and “Varmint Grade” lines. The Match Grade ammo features mostly Berger bullets (with some Noslers and Sierras), while Varmint Grade ammo is loaded with Barnes, Hornady, and Nosler bullets.
Click Images to Load Full-Size Images (with larger type)
We have no idea whether ProGrade Ammunition will shoot well and prove reliable. We don’t know what brass, powders, or primers ProGrade will be using. In a recent press release, ProGrade touts its Match Grade products: “Match Grade rounds are all hand-loaded in the United States and use premium components that are held to higher standards of consistency, leaving little room for inaccuracy. Match Grade means every element is made to be as uniform as possible in weight, primer pocket and neck size. This means everything — from bullet weight and powder weight to brass thickness and case length — is as precise as possible.”
Time (and rounds on target) will determine if ProGrade ammo is good stuff. But in this period of shortages, with ammunition of all kinds being hard to find, it is good to see a new domestic ammo-maker getting into the business, and producing cartridges with high-quality projectiles. We wish the folks at ProGrade success in their endeavor. To learn about ProGrade’s full line of ammunition, call (435) 865-5995, or visit www.progradeammo.com.
Back in May, IBS shooter Rodney Wagner shot a 0.349″ (50-2X) 5-shot group that became the talk of the shooting community. This was the smallest 600-yard group shot in the history of recorded rifle competition. Rodney’s group cuts the existing IBS 600-yard record in half. Rodney put five shots under the size of a dime at the distance of six football fields. Just pause and think about that…
News of this amazing feat spread like wildfire via the internet. People were amazed at what Rodney accomplished. Here are some actual comments posted on various shooting forums:
308Nut: Simply Astounding.
Coues Sniper: That’s insanity.
PapaJohn: I strut around like a peacock if my rifles will shoot under a half-inch at 100 yards. His group was better than that at six times the distance… that’s just unfathomable. I don’t see anyone breaking that record for a loooooooooooong time!
Given the spectacular (and historic) nature of Rodney’s 600-yard group, many folks wanted to learn more about Rodney’s equipment and his shooting techniques. For that reason, we’ve compiled this follow-up report. Rodney was kind enough to provide a short video showing his equipment and shooting technique. In his video demonstration, Rodney runs off a 5-shot group in about 19 seconds. When he actually shot the 0.349″ group, Rodney estimates he got the five shots down-range in 12-15 seconds. (He slowed down a bit for the video!)
Watch Rodney Wagner Fire Five Shots in Under 20 Seconds
Rodney comments: “You’ll notice I hold the stock with my left hand while working the bolt to keep it from losing its ‘track’ (that slows me down a lot). I have just gotten into the habit of doing that because I feel tracking is one of the most important things not to take for granted. With this technique I don’t have to ‘saw’ the stock into the bags as much when I get on to the record target.”
Record-Setting Load: Varget Powder, CCI Primers, and Berger 108s Jumped
Rodney’s record 0.349″ group works out to 0.055 MOA at 600 yards. To shoot a “zero” group at 600 yards you need the finest components and insanely good reloading techniques (not to mention the grace of God.) As he does with all his 600-yard ammo, Rodney pre-loaded before the match. This particular ammo had been loaded 5-6 days before the match. Here are specs on Rodney’s load:
32.5 Grains of Hodgdon Varget Powder and CCI 450 Primers.
108gr Berger BT Match bullets seated 0.020″ away from the lands.
Lapua 6mmBR brass fire-formed to 6 Dasher and turned to 0.265″ loaded round for a 0.268″-neck chamber.
Neck-sized with a 0.262″ Redding bushing.
Note that Rodney was using Berger 108s, not the 105gr VLDs or Berger’s popular 105gr Hybrids. Rodney found his Brux barrel shot best with the 108s: “I’d get really nice 4-shot groups with the VLDs, but it seemed there would be four together and one out. The 108s seem to have less fliers.” Rodney experimented with seating depths before he settled on a .020″ jump: “I shot them for a long time 3 to 5 thousandths in the lands, just barely in the lands. But I knew Sam Hall had really good luck jumping. So I went to .020″ jump and it all came together. The 108s have shot good like that in three different Brux barrels (all chambered with the same reamer) so I just start at that setting now — twenty off the lands.”
Record-Setting Equipment
Rodney was shooting a 17-lb Light Gun. It features a BAT Machine ‘B’ action, and a 29″ Brux barrel chambered for the 6mm Dasher with a 0.268″ neck. The 0.236″-land, 4-groove barrel was fairly new when the record group was shot — it had about 300 rounds through it, and had shot 30 rounds since its last cleaning. Rodney chambered the barrel himself. The stock is a Shehane ST-1000 fiberglass tracker, inletted and bedded by Tom Meredith. A March 10-60x52mm scope is held in Burris Signature Zee rings on a +10 MOA rail. These rings are inexpensive, but they work just fine, notes Rodney: “With the inserts I can align the scope mechanically and keep the windage pretty much centered in its travel.”
Supporting his rifle, Rodney used a Farley co-axial rest up front (on Super-Feet) and a Protektor Doctor bag in the rear. The Farley features a Borden top carrying an Edgewood bag. Rodney notes: “In the front, I use the black diamond blasting sand, because it doesn’t pack as hard as regular sand. You can buy it at tractor supply stores in the welding section. It’s not as heavy as heavy sand.”
In the rear, Rodney runs a flat-top Protektor Doctor bag with Cordura ears. Rodney uses Sinclair heavy sand in his rear bag. He says “it’s got some squish — not much but just a little — call it a medium-hard fill”. Interestingly, Rodney sets up the bag so that the flat on the bottom of the stock rides on the stitches between the ears: “I like the stock to touch the top of the bag between the ears — I don’t like to see daylight.”
Conditions for the Record — You May Be Surprised
Many folks who have commented on Rodney’s 0.349″ group have wrongly assumed that the 0.349″ group was shot in “perfect” zero-wind conditions. Not so. There were switchy 5 mph winds with gusts to 10 mph. Rodney notes that on his second target of the day, he had to hold in three different places to manage a decent-sized group. So for those who think the group was shot in miraculous conditions, we have to say that wasn’t the case.
Creating Ultra-Accurate 6mm Dasher Ammunition
Rodney takes great care in loading his brass, and he employs a few tricks to get superior consistency.
Fire-Forming — To prepare his cases for fire-forming, Rodney starts by turning his Lapua brass to just past where the new neck-shoulder junction will be: “I just cut enough for the 6mm Dasher neck. A little bit of the cut shows on the shoulder after forming.” Then Rodney runs a .25-caliber K&M mandrel through the whole neck, expanding the neck diameter. After the entire neck is expanded, Rodney re-sizes the top section with a Wilson bushing, creating a false shoulder. Then, as further insurance that the case will be held firmly in place during fire-forming, Rodney seats his bullets long — hard into the lands. When fire-forming, Rodney uses a normal 6mmBR load of 29.8 grains of Varget: “I don’t like to stress my brass before it has been hardened. I load enough powder to form the shoulder 95%. Any more than that is just wasted.” Rodney adds: “When fire-forming, I don’t want to use a super-hard primer. I prefer to use a Federal 205, CCI 200, or Winchester — something soft.” Using a softer primer lessens the likelihood that the case will drive forward when hit by the firing pin, so this helps achieve more consistent “blow lengths”.
Ammo Loading — Rodney is fastidious with his brass and weighs his charges very precisely. Charges are first dispensed with an RFD manual powder measure, then Rodney trickles kernel by kernel using a highly-precise Sartorius GD-503 laboratory scale. He tries to maintain charge-weight consistency within half a tenth of a grain — about two kernels of Varget powder.
One important technique Rodney employs is sorting by bullet-seating force. Rodney batch-sorts his loaded rounds based on seating force indicated by the dial gauge on his K&M arbor press: “I use a K&M arbor press with dial indicator strain gauge. When I’m loading I pay lots of attention to seating effort and I try to batch five rounds that feel the same. For record rounds I try to make sure I get five of the same number (on the dial). When sorting based on the force-gauge readout, you need to go slow. If you go too fast the needle will spike up and down before you can see it.”
In practice, Rodney might select five rounds with a gauge value of 25, then another five with a gauge read-out of 30 and so on. He places the first five like-value rounds in one row of his ammo caddy. The next like-value set of five will go in the next row down. By this method, he ensures that all five cartridges in a five-round set for a record target will have bullets seated with very consistent seating force.
Unlike some top shooters, Rodney does not regularly anneal his cases. However, after every firing, he does tumble his Dasher brass in treated corncob media. After sizing his brass, before seating the bullets, he runs a nylon brush in the necks: “The last thing I do before firing is run a well-worn 30 caliber nylon brush in the necks, using a small 6-volt drill for power. This is a quick operation — just in and out the neck”. Sometimes, at the end of the season, he will anneal, but Rodney adds: “If I can get 10 firings out of the case I’ve done good.” He usually makes up new brass when he fits a new barrel: “If it is a good barrel (that I may shoot at the Nationals), I’ll usually go ahead and prepare 200 pieces of good brass.”
Shooting Techniques — Piloting a 600-yard Group into the Zeros Gun-handling and Rate of Fire — As you can see from the video, Rodney shoots with very minimal contact on the rifle. He normally shoots a string fast, but he remains calm and steady — almost machine-like. In the video he runs five shots in about 19 seconds, but he figures he shot the 0.349″ group in 12-15 seconds. Rodney says: “I’m not quite as fast as Sam Hall but I can usually run ‘em under fifteen seconds, sometimes closer to 10 on a good day. But when I shot the 0.349″ I couldn’t see the flags for the last shot so I dipped the joystick down between 4th and 5th shots, and that took a couple seconds. The flags had not changed, so I kept the same point of aim for 4th and 5th shot. I’d been watching that flag all morning, so to satisfy my curiosity I kind of dipped down for a second.”
Aiming for the Nine — To shoot ultra-small at long range, you must aim very, very precisely. When shooting at 600 yards, Rodney lines up his cross-hairs on the white number “9” in the blue field above the ten ring. This is visible through his rifle-scope at 600 yards, and it provides an aim point smaller than the center “X”.
Rodney explains: “I always aim for the number 9 up in the blue field. It provides for a smaller aim point. I noticed a difference when I started doing that. I learned that from some guys from South Dakota. It made sense so I’ve been doing it ever sense.”
Tips for 600-Yard Shooters New to the Game
In the course of our interview with Rodney, we asked if he had any tips for shooters who are getting started in the 600-yard Benchrest Game. Rodney offered some sensible advice:
1. Don’t try to go it alone. Find an old-timer to mentor you. As a novice, go to matches, watch and ask questions.
2. Go with a proven cartridge. If you are shooting 600 yards stick with a 6mmBR or one of the 6BR improveds (BRX or Dasher). Keep it simple. I tried some of the larger cartridges, the 6XC and 6-6.5×47 Lapua. I was trying to be different, but I was not successful. It wasn’t a disaster — I learned something. But I found the larger cases were not as accurate as a 6BR or Dasher. Those bigger cartridges are competitive for score but not for group.
3. You don’t have to spend a fortune to be competitive. Buy a used rifle from somebody and find out if you like the sport. You can save a lot with a used rifle, but do plan on buying a new barrel immediately.
4. Don’t waste weeks or months struggling with a barrel that isn’t shooting. My best barrels, including this record-setting Brux, started shooting exceptionally well right from the start.
Another long-range benchrest record was set recently — this time at the Williamsport Range in Pennsylvania. On Saturday, May 18, 2013, Paul Martinez shot a fantastic 3.505″ 10-shot group at 1000 yards. It was nicely centered for a 99-6X score as well. Paul’s 3.505″ group should be a new 10-shot record for the 17-lb Light Gun Class under Williamsport Rules. The previous best was a 3.746″ (99-1X) group shot by Scott Weber at Williamsport last summer. Congrats to Paul for some great shooting!
Paul’s 17-lb Light Gun was chambered as a .300 WSM and Paul was loading heavy-weight .30-caliber Berger bullets. Paul’s rifle was smithed by Eric Springman of Springman Rifles in Allenwood, PA. Paul’s record-setting rifle featured a Borden action, Krieger barrel, McMillan MBR Tooley stock, and Nightforce Benchrest model scope (we don’t know if this was the old BR scope or the new-for-2013 version). Eric Springman notes: “This was not a fluke — Paul has shot several small groups with this gun and has shot under 4″ at 1000 yards before.”
Under Williamsport Rules, the Light Gun Class shoots 10-shot groups at 1000 yards. Under IBS and NBRSA Rules, Light Guns shoot 5-shot groups at 1000 yards, so there is no comparable IBS or NBRSA 10-shot record for the 17-lb class. However, IBS and NBRSA Heavy Guns DO shoot 10-shot groups at 1000 yards. The current IBS Heavy Gun 10-shot record is 3.044″, shot by Joel Pendergraft in 2009. The NBRSA 10-Shot Heavy Gun record is 4.322″ by Dave Tooley, posted in 2006. Looking at those numbers, Paul Martinez’s 3.505″ beats the existing NBRSA HG record by 0.817″ and Paul’s group is just 0.461″ off the IBS HG record. Any way you look at it, that is great shooting with a 17-lb rifle.
Effects Of Cartridge Over All Length (COAL) And Cartridge Base To Ogive (CBTO) – Part 1 by Bryan Litz forBerger Bullets.
Many shooters are not aware of the dramatic effects that bullet seating depth can have on the pressure and velocity generated by a rifle cartridge. Cartridge Overall Length (COAL) is also a variable that can be used to fine-tune accuracy. It’s also an important consideration for rifles that need to feed rounds through a magazine. In this article, we’ll explore the various effects of COAL, and what choices a shooter can make to maximize the effectiveness of their hand loads.
Sporting Arms and Ammunition Manufacturers’ Institute (SAAMI)
Most loading manuals (including the Berger Manual), present loading data according to SAAMI (Sporting Arms and Ammunition Manufacturers’ Institute) standards. SAAMI provides max pressure, COAL and many other specifications for commercial cartridges so that rifle makers, ammo makers, and hand loaders can standardize their products so they all work together. As we’ll see later in this article, these SAAMI standards are in many cases outdated and can dramatically restrict the performance potential of a cartridge.
Bullet seating depth is an important variable in the accuracy equation. In many cases, the SAAMI specified COAL is shorter than what a hand loader wants to load their rounds to for accuracy purposes. In the case where a hand loader seats the bullets longer than SAAMI specified COAL, there are some internal ballistic effects that take place which are important to understand.
Effects of Seating Depth / COAL on Pressure and Velocity
The primary effect of loading a cartridge long is that it leaves more internal volume inside the cartridge. This extra internal volume has a well known effect; for a given powder charge, there will be less pressure and less velocity produced because of the extra empty space. Another way to look at this is you have to use more powder to achieve the same pressure and velocity when the bullet is seated out long. In fact, the extra powder you can add to a cartridge with the bullet seated long will allow you to achieve greater velocity at the same pressure than a cartridge with a bullet seated short.
Figure 1. When the bullet is seated farther out of the case, there is more volume available for powder. This enables the cartridge to generate higher muzzle velocity with the same pressure.
When you think about it, it makes good sense. After all, when you seat the bullet out longer and leave more internal case volume for powder, you’re effectively making the cartridge into a bigger cartridge by increasing the size of the combustion chamber. Figure 1 illustrates the extra volume that’s available for powder when the bullet is seated out long.
Before concluding that it’s a good idea to start seating your bullets longer than SAAMI spec length, there are a few things to consider.
Geometry of a Chamber Throat
The chamber in a rifle will have a certain throat length which will dictate how long a bullet can be loaded. The throat is the forward portion of the chamber that has no rifling. The portion of the bullet’s bearing surface that projects out of the case occupies the throat (see Figure 2).
The length of the throat determines how much of the bullet can stick out of the case. When a cartridge is chambered and the bullet encounters the beginning of the rifling, known as the lands, it’s met with hard resistance. This COAL marks the maximum length that a bullet can be seated. When a bullet is seated out to contact the lands, its initial forward motion during ignition is immediately resisted by an engraving force.
Seating a bullet against the lands causes pressures to be elevated noticeably higher than if the bullet were seated just a few thousandths of an inch off the lands.
A very common practice in precision reloading is to establish the COAL for a bullet that’s seated to touch the lands. This is a reference length that the hand loader works from when searching for the optimal seating depth for precision. Many times, the best seating depth is with the bullet touching or very near the lands. However, in some rifles, the best seating depth might be 0.100″ or more off the lands. This is simply a variable the hand loader uses to tune the precision of a rifle.
Sinclair Int’l now carries Bullet Sample Packs from Bullet Proof Samples LLC. These 12-bullet packs are available for Berger, Barnes, and Nosler bullets in popular weights, types, and calibers. With the sample packs, during load development, you can try out a variety of projectiles without investing in an entire box of each type. That’s smart. Sample packs range in price from $5.99 to $15.99 (for twelve bullets per pack). Most of the Berger bullet packs are priced under $10.00, with many in the $6-$7 range.
CLICK HERE for the Sinclair Int’l bullet sample pack webpage. (Once there, select Barnes, Berger, or Nosler). You’ll also find the sample packs on page six of the Sinclair Int’l print catalog. To place an order, or for additional information, call 800-717-8211 or visit www.sinclairintl.com.
At the end of this year, Berger Bullets plans to introduce a new projectile that may truly be the most revolutionary bullet design since the advent of jacketed spitzers in the late 19th Century. Berger’s new bullet is unlike anything we have ever seen before. It features concentric curved ridges, or “ripples”, on the bearing surface. Tests show that this new projectile, dubbed the “Sonic Ripple Bullet”, has signficantly less drag than conventional bullets (no matter what their ogive configuration). In addition, the Sonic Ripple design provides increased stability at all velocities (allowing barrels with slower twist rates for a given bullet weight).
So, what does all this mean in practical terms? Well, compared to conventional bullets (of similar weight/size), the Sonic Ripple Bullet will shoot a flatter trajectory, buck the wind better, retain energy longer, and remain stable for a much longer distance. That’s big news for competitive shooters, tactical shooters, and long-range hunters.
The Science of the Sonic Ripple Bullet Design
Bryan Litz, Ballistician for Berger Bullets, explains: “This radical leap forward in bullet design was made possible by advanced, new bullet-making technologies. The unusual bullet appearance is only part of the revolutionary ‘Sonic Ripple’ system. The curvilinear waves or ripples in the bullet jacket are designed to create a specific resonance when fired from a specially ‘tuned’ barrel system. The result is an optimization of the sonic wavefront created by the bullet as it travels through its trajectory. This wavefront optimization simultaneously reduces bullet drag while increasing bullet stability.”
In essence, the supersonic shock-wave is smoothed out, dramatically reducing secondary wave fronts. This is all good, as Bryan explains: “If all the internal ballistic requirements are met, the Sonic Ripple bullet exits the muzzle with a harmonically-stabilized launch dynamic. As a further benefit of the ripple design, tests show that the concentric ripples also enhance boundary layer airflow attachment on the bullet. This, in turn, dramatically reduces wake turbulence and attendant drag.”
The reduction of wake turbulence (combined with wavefront optimization) represents a “major breakthrough” which should increase projectile BC by at least 0.14 (on G7 scale), according to Bryan. But, we wondered, might the increased surface area associated with the ripples slow the bullet down in flight? Actually, no. Bryan explained: “Eddies in the boundary layer around the ripples actually lower skin friction drag which more than compensates for increased surface area, resulting in a net friction drag loss at all velocities — both supersonic and transonic.”
Sonic Ripple Bullets Available by the End of 2013
When will we see Sonic Ripple Bullets on dealers’ shelves? Maybe this year. Berger’s marketing department told us: “The Sonic Ripple technology is currently under development and is expected to mature enough for commercial application by late fall, 2013.”
The Berger Southwest Long Range Nationals are held every February at the Ben Avery Shooting Facility just north of Phoenix, Arizona. Berger has partnered with the Desert Sharpshooters Rifle Club and the Arizona Game and Fish Department, resulting in a “must attend” event for long range shooters around the world.
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Back in May, IBS shooter Rodney Wagner shot a 0.349″ (50-2X) 5-shot group that became the talk of the shooting community. This was the smallest 600-yard group shot in the history of recorded rifle competition. Rodney’s group cuts the existing IBS 600-yard record in half. Rodney put five shots under the size of a dime at the distance of six football fields. Just pause and think about that…
One important technique Rodney employs is sorting by bullet-seating force. Rodney batch-sorts his loaded rounds based on seating force indicated by the dial gauge on his K&M arbor press: “I use a K&M arbor press with dial indicator strain gauge. When I’m loading I pay lots of attention to seating effort and I try to batch five rounds that feel the same. For record rounds I try to make sure I get five of the same number (on the dial). When sorting based on the force-gauge readout, you need to go slow. If you go too fast the needle will spike up and down before you can see it.”
Aiming for the Nine — To shoot ultra-small at long range, you must aim very, very precisely. When shooting at 600 yards, Rodney lines up his cross-hairs on the white number “9” in the blue field above the ten ring. This is visible through his rifle-scope at 600 yards, and it provides an aim point smaller than the center “X”.
Effects Of Cartridge Over All Length (COAL) And Cartridge Base To Ogive (CBTO) – Part 1
The Science of the Sonic Ripple Bullet Design
