Here’s a valuable web resource our readers should bookmark for easy access in the future. ShootForum.com offers a vast Bullet Database, which includes roughly 3900 bullet designs in all. We counted nearly 200 different 6mm bullets! The bullet info comes from the makers of QuickLOAD Software. Access to the online database is FREE. Most database entries include Caliber, Manufacturer, Stated Bullet Weight, True Bullet Weight, Length, Sectional Density (SD), and Ballistic Coefficient.* In many cases multiple BCs are provided for different velocity ranges.
The database is great if you’re looking for an unusual caliber, or you want a non-standard bullet diameter to fit a barrel that is tighter or looser than spec. You’ll find the popular jacketed bullets from major makers, plus solids, plated bullets, and even cast bullets. For those who don’t already own QuickLOAD software, this is a great resource, providing access to a wealth of bullet information.
Values for Changed Bullet Designs
Some of our readers have noted some variances with BCs and OALs with recently changed bullet designs. In general the database is very useful and accurate. However, as with any data resource this extensive, there will be a few items that need to be updated. Manufacturers can and do modify bullet shapes. Kevin Adams, one of the creators of the database, explains: “Thanks for mentioning this database. It took us a long time to collate this information and have agreement to publish it. Please keep in mind that individual batches of bullets will differ from the manufacturers’ stated standards. This is more a reflection on the manufacturers’ tolerances than the database ‘accuracy’. We will continue to add to the database as more manufacturers’ figures come available.”
Six bucks — that’s less than the price of a burger and fries these days. But for the same small sum you can get something that will last a lot longer — a Sierra Counter Mat that displays the entire line of Sierra Bullets from .20 caliber up to .458 caliber. Right now Sierra is offering its foam-backed 16 ¼” x 21 ½” counter mat for just $6.00 (plus S&H). This displays over 160 bullet types (including 10 new bullets), complete with specifications, BCs and product codes. You can order online from the Sierra website or call 1-888-223-3006. Note, the last shipping day for 2015 will be Friday, December 18th.
This is a handy item for your reloading room or workshop. The mat provides a comfortable, non-marring surface for working on your rifles and pistols. It will also, to some degree, provide a barrier to oils and solvents, protecting your bench top.
Sierra has released two new Tipped MatchKing (TMK®) bullets that should find favor with PRS competitors and tactical shooters*. Sierra is producing a new 95 grain 6mm projectile and a new 130 grain 6.5mm bullet. Both feature acetal resin tips that lower drag by improving the ballistic coefficient (BC) and making the BC more uniform from bullet to bullet. The 95-grainer should work well as a higher-speed option in the .243 Win, 6mm Creedmoor, 6mm Dasher, and 6mmBR. We were able to push other 95gr bullets nearly 100 fps faster than 105gr bullets from a 6mmBR. For those shooting the 6.5×47 Lapua and 6.5 Creedmoor, the new 130gr TMK should be a near-ideal bullet weight. We know that Berger’s 6.5mm 130gr VLD works great in those mid-sized cartridges, so Sierra’s new 130-grainer should be in the “sweet spot”. Also, in the .260 Remington the 130gr TMK should be capable of velocities that hit predicted accuracy nodes with ease. The 6mm 95 grain TMK requires a twist rate of 1:9″ or faster to stabilize while the 6.5mm 130 grain TMK requires a twist rate of 1:8″ or faster to stabilize.
We expect the 130gr 6.5mm TMK to find favor with Tactical Shooters
* In addition, Sierra plans to add a 7mm 160gr TMK to the line-up, product #7660, but we don’t expect this to be used for tactical games because of the heavier recoil.
Here’s something you don’t see very often — Lapua cartridge brass on sale. As part of its Back-to-Black promotion, Brownells has deeply discounted its inventories of Lapua Brass. For most cartridges/calibers, the price has been reduced at least $10.00 per 100-count box. Here are the sale prices, good through the end of the week:
Bryan Richardson, owner of Powder Valley Inc. (PVI), just notified us that PVI is running a super special on big-name bullets. Get Five Hundred 6.5mm (.264) 140gr HPBT MatchKings for just $115.00. That works out to just $23 per hundred for premium match bullets. Or, for you varminters, get Five Hundred .224-Caliber BlitzKings for just $75.00. At just $15 per hundred, that’s a steal for first-run bullets.
To buy these bullets, go to www.PowderValleyinc.com, then click on “Specials” on the menu bar.
Bryan tells us: “We just received a great buy on some custom major manufacturer bullets. We’re passing the savings on to you. Save 25-30% over what we normally sell these bullets for on our website. Check out the Specials Page and look for the bullets with a description of Custom. They won’t last long at these prices!” Questions? Feel free to call 800-227-4299 or email reload [at] powdervalleyinc.com.
At the request of our readers, we have launched a “Deals of the Week” feature. If this proves popular, we’ll try to run this every Monday. Here are some of the best deals on hardware, reloading components, and shooting accessories. Be aware that sale prices are subject to change, and once clearance inventory is sold, it’s gone for good. You snooze you lose.
1. Midsouth and Powder Valley — Hodgdon Varget and H4350
Two of the most sought-after (and hard-to-find) powders are now available, at least in one-pound versions. Midsouth Shooters Supply has Hodgdon Varget in one-pound containers for $23.30/pound, while Powder Valley has Hodgdon H4350 in one-pound containers for $23.25/pound. Act quickly — supplies are limited. NOTE: If these sources run out, Precision Reloading has both Varget AND H4350, priced at $29.49 for a one-pound container.
11/10/2015 Update: Midsouth has Sold Out of Varget. Precision Reloading still has it.
2. Grafs.com — Nikon Laser Rangefinder Scope
Now can get a quality Nikon riflescope with a built-in Laser Rangefinder for no more than you’d pay for a Rangefinder by itself. That’s right, Nikon’s advanced 2.5-10x40mm M-223 LASER IRT combines a Laser Rangefinder with a full-featured scope. This is good set-up for hunting — you don’t have to carry a separate LRF. This unit offers “one-touch” activation with range values that display for 12 seconds. That makes it easy to hold your rifle with both hands while scanning.
3. Natchez Shooters Supply — 325 Rounds .22 LR Ammo, $20.99
Now we’re talking — this is the kind of pricing on bulk rimfire ammo we used to see in the “good old days”. Act quickly, this Federal .22 LR Ammo deal won’t last long. Also, seller Natchez has a purchase limit: “Due to limited supplies and high demand this item has a 2-piece maximum order quantity per customer, per every 1 day.” So you may order two boxes per day, which will total 650 rounds. The bullets are 40 grains, solid lead.
4. CDNN Sports — Walther PK380, $339.99
Bond… James Bond. If 007 were to pack a modern-day equivalent of his Walther PPK, it would be this slim new PK380 in .380 ACP. Weighing just 19.4 ounces, the slim PK380 is easy to carry. The grip is very comfortable even for small hands, and the slide is easy to operate, making this a good choice for the ladies. The PK380 has an ambidextrous manual safety and is hammer-fired.
5. Bullets.com — New Heavy, Cast-Iron 50 BMG Front Rest
If you’re shooting a Fifty, you need lots of stability. Now there’s a big, heavy front rest designed expressly for the big .50 Caliber rifles. This new, 20″-wide cast iron rest weighs a whopping 24 pounds. Pin-to-Pin footprint is 18.9″ providing outstanding stability and resistance to rocking. The large top accepts front bags up to 8-3/4″ x 3″ (bag not included). Designed to be used either on the bench or on the ground, the new Bald Eagle Big Fifty Cast Iron Rest (Model BE1161) is available for $375.00 as an introductory special.
6. Creedmoor Sports — $50 Off Hardback Shooting Coats
As an end-of-year special, Creedmoor Sports has knocked $50.00 off its famous Hardback shooting coats. Choose from all-leather, leather + Cordura nylon, or all-Cordura. We personally like the Combo coat that uses leather in the arms/shoulders with nylon in the front. This saves weight and is a bit more comfortable in summer heat.
Yes, you can get a name-brand Ultrasonic cleaning machine for under fifty bucks. This Hornady Lock-N-Load Sonic Cleaner, which sells elsewhere for $75-$85, is available at Brownells.com this week for just $49.99. This cleaning machine holds up to 200 .223 Remington cases, or 100 .308 Winchester cases.
8. Amazon.com — Manfrotto 410 3-Axis Geared Head
Once you’ve used a geared head for your spotting scope, you’ll never want to go back to standard tripod controls. The Manfrotto 410 Junior Geared Head delivers precise 3-Axis control: 360° of pan (traverse), +90° to -30° of front tilt (elevation), and +90° to -30° of lateral tilt. When spotting, this makes it much easier to traverse from one target to another — you can move horizontally with no vertical movement. AccurateShooter’s editors use this model 410, which features a quick-release plate. This is a very good deal. This same Manfrotto 410 Geared head sells elsewhere for $270.00 or more.
If you want to load ultra-accurate ammo and shoot very small groups, you should read this article, which we are re-publishing by popular demand. Many novice handloaders believe that neck bushing Inside Diameter (ID) size is the only important factor in neck tension. In fact, many different things will influence the grip on your bullet and its ability to release from the case neck. To learn the ins and outs of neck tension, take some time and read this article carefully.
Neck Tension (i.e. Grip on Bullets) Is a Complex Phenomenon
While we certainly have considerable control over neck tension by using tighter or looser bushings (with smaller or bigger Inside Diameters), bushing size is only one factor at work. It’s important to understand the multiple factors that can increase or decrease the resistance to bullet release. Think in terms of overall brass-on-bullet “grip” instead of just bushing size.
Bullet grip is affected by many things, such as:
1. Neck-wall thickness.
2. Amount of bearing surface (shank) in the neck.
3. Surface condition inside of neck (residual carbon can act as a lubricant; ultrasonic cleaning makes necks “grabby”).
4. Length of neck (e.g. 6mmBR neck vs. 6mm Dasher).
5. Whether or not the bullets have an anti-friction coating.
6. The springiness of the brass (which is related to degree of work-hardening; number of firings etc.)
7. The bullet jacket material.
8. The outside diameter of the bullet and whether it has a pressure ridge.
9. Time duration between bullet seating and firing (necks can stiffen with time).
10. How often the brass is annealed
— and there are others…
One needs to understand that bushing size isn’t the beginning and end of neck tension questions, because, even if bushing size is held constant, the amount of bullet “grip” can change dramatically as the condition of your brass changes. Bullet “grip” can also change if you alter your seating depth significantly, and it can even change if you ultrasonically clean your cases.
In our Shooters’ Forum a reader recently asked: “How much neck tension should I use?” This prompted a Forum discussion in which other Forum members recommended a specific number based on their experience, such as .001″, .002″, or .003″. These numbers, as commonly used, correspond to the difference between case-neck OD after sizing and the neck OD of a loaded round, with bullet in place. In other words, the numbers refer to the nominal amount of interference fit (after sizing).
While these commonly-used “tension numbers” (of .001″, .002″ etc.) can be useful as starting points, neck tension is actually a fairly complex subject. The actual amount of “grip” on the bullet is a function of many factors, of which neck-OD reduction during sizing is just one. Understanding these many factors will help you maintain consistent neck tension as your brass “evolves” over the course of multiple reloadings.
Seating Depth Changes Can Increase or Decrease Grip on Bullet
You can do this simple experiment. Seat a boat-tail bullet in your sized neck with .150″ of bearing surface (shank) in the neck. Now remove the bullet with an impact hammer. Next, take another identical bullet and seat it with .300″ of bearing surface in another sized case (same bushing size/same nominal tension). You’ll find the deeper-seated bullet is gripped much harder.
Neck-Wall Thickness is Important Too
I have also found that thinner necks, particularly the very thin necks used by many PPC shooters, require more sizing to give equivalent “grip”. Again, do your own experiment. Seat a bullet in a case turned to .008″ neckwall thickness and sized down .003″. Now compare that to a case with .014″ neckwall thickness and sized down .0015″. You may find that the bullet in the thin necks actually pulls out easier, though it supposedly has more “neck tension”, if one were to consider bushing size alone.
In practical terms, because thick necks are less elastic than very thin necks, when you turn necks you may need to run tighter bushings to maintain the same amount of actual grip on the bullets (as compared to no-turn brass). Consequently, I suspect the guys using .0015″ “tension” on no-turn brass may be a lot closer to the guys using .003″ “tension” on turned necks than either group may realize.
Toward a Better Definition of Neck Tension
As a convenient short-cut, we tend to describe neck tension by bushing size alone. When a guy says, “I run .002 neck tension”, that normally means he is using a die/bushing that sizes the necks .002″ smaller than a loaded round. Well we know something about his post-sizing neck OD, but do we really have a reliable idea about how much force is required to release his bullets? Maybe not… This use of the term “neck tension” when we are really only describing the amount of neck diameter reduction with a die/bushing is really kind of incomplete.
My point here is that it is overly simplistic to ask, “should I load with .001 tension or .003?” In reality, an .001″ reduction (after springback) on a thick neck might provide MORE “grip” on a deep-seated bullet than an .003″ reduction on a very thin-walled neck holding a bullet with minimal bearing surface in the neck. Bushing ID is something we can easily measure and verify. We use bushing size as a descriptor of neck tension because it is convenient and because the other important factors are hard to quantify. But those factors shouldn’t be ignored if you want to maintain consistent neck tension for optimal accuracy.
Consistency and accuracy — that’s really what this all about isn’t it? We want to find the best neck tension for accuracy, and then maintain that amount of grip-on-bullet over time. To do that you need to look not only at your bushing size, but also at how your brass has changed (work-hardened) with time, and whether other variables (such as the amount of carbon in the neck) have changed. Ultimately, optimal neck tension must be ascertained experimentally. You have to go out and test empirically to see what works, in YOUR rifle, with YOUR bullets and YOUR brass. And you may have to change the nominal tension setting (i.e. bushing size) as your brass work-hardens or IF YOU CHANGE SEATING DEPTHS.
Remember that bushing size alone does not tell us all we need to know about the neck’s true “holding power” on a bullet, or the energy required for bullet release. True bullet grip is a more complicated phenomenon, one that is affected by numerous factors, some of which are very hard to quantify.
High-BC 7mm bullets are favored by many of the top long-range and F-Class (Open) shooters. Now, thanks to Sierra Bullets, there is a new “heavy-weight contender” in the 7mm match bullet category. Sierra has just introduced an all-new 183 grain 7mm HPBT MatchKing, part # 1983. This impressive new projectile boasts a 0.707 G1 Ballistic Coefficient (at 2300+ fps), plus — get this — it comes “tipped” from the factory. The final meplat tipping operation ensures a higher, more uniform BC. Recommended barrel twist rate is 1:8″ or faster.
Sierra says its new 183gr 7mm MatchKing has a modern, low-drag shape: “A sleek 27-caliber elongated ogive and a final meplat reducing operation (pointing) provide an increased ballistic coefficient for optimal wind resistance and velocity retention. To ensure precise bullet to bore alignment, a unique bearing surface to ogive junction uses the same 1.5 degree angle commonly found in match rifle chamber throats.
The new 7mm 183gr HPBT bullets will be available in boxes of 500 bullets (#1983C) with MSRP of $256.34 per box and boxes of 100 bullet (#1983) with MSRP of $51.80 per box. NOTE: Sierra states that “MatchKing® and Tipped MatchKing® bullets are not recommended for most hunting applications.”
In 2016, Hornady will introduce new hunting and match bullets with high-tech, heat resistant tips. Hornady developed the new “Heat Shield” bullet tips after Doppler Radar testing showed that the Ballistic Coefficients (BCs) of old-style tipped bullets were degrading in flight in an unexplained manner. Hornady’s engineers theorized that the old-style plastic bullet tips were deforming in flight due to heat and pressure. Hornady claims this problem occurred with high-BC (0.5+ G1) tipped bullets from a variety of manufacturers. Hornady’s testers believed that, after 150 yards or so, the tips on high-BC bullets were actually melting at the front. That enlarged the meplat, resulting in increased drag.*
Consequently, Hornady developed a new type of bullet tip made from a heat-resistant polymer. Further long-range Doppler Radar testing seemingly confirmed that bullets equipped with the new tips did not suffer from the BC loss previously found. This allowed the bullets to maintain a higher, more consistent BC during the entire trajectory. The end result is a bullet with reduced vertical dispersion at long range (or so Hornady claims).
New Hornady ELD-X Hunting Bullets
For 2016, Hornady will bring out two lines of projectiles using the new tips. The first line of bullets, designed for hunting, will be called ELD-X, standing for “Extreme Low Drag eXpanding”. These feature dark red, translucent, heat-resistant tips. With interlock-style internal construction, these hunting projectiles are designed to yield deep penetration and excellent weight retention. Hornady will offer seven different ELD-X bullet types, ranging in weight from 143 grains (6.5mm) to 220 grains (.30 Cal):
NOTE: We don’t know if the stated BC values are based on drag models or actual range testing. These new ELD-X hunting bullets will be loaded into a new line of Precision Hunter Ammo for a variety of popular hunting cartridges.
New Hornady ELD Match Bullets
Along with its new hunting bullets, Hornady is coming out with a line of ELD Match bullets as well. Hornady’s engineers say the new molded “Heat Shield Tip” should be a boon to competitive shooters: “You can’t point up that copper [tip] as consistently as you can mold a plastic tip. With the ELD Match line, and the Heat Shield Tip technology… we now have a perfected meplat. These bullets allow you to shoot groups with less vertical deviation, or less vertical stringing, because the bullets are exact in their drag [factor].” There are currently four bullets in the ELD Match line:
Hornady will offer factory ammunition loaded with ELD Match bullets, starting with 6.5 Creedmoor ammo loaded with the 140gr ELD, and .338 Lapua Magnum ammo loaded with the 285gr ELD.
Better Tips Make a Difference — But other Factors Are Important
Hornady claims that its new Heat Shield Tips are more uniform than the meplats on conventional jacketed, hollow-point bullets. This, Hornady says, should provide greater bullet-to-bullet BC consistency than is possible with conventional, non-tipped bullets.
We have heard such claims before. Plastic tips are good, so long as they are inserted perfectly in the bullet. But sometimes they are crooked (off-axis) — we’ve seen that with various brands of tipped projectiles. Other factors will affect bullet performance as well, such as bullet weight, bullet diameter, and bullet bearing surface length. Even with perfectly uniform bullet tips, if bullet weights or diameters are inconsistent across a sample, you can still have accuracy issues (and pressure-related velocity variances). Likewise, if the bearing surface lengths vary considerably from one bullet to the next, this can increase velocity spread and otherwise have a deleterious effect on accuracy.
So, overall, we think Hornady has probably engineered a better bullet tip, which is a good thing. On the other hand there are many other factors (beyond tip uniformity) involved in long-range bullet performance. It will be interesting to test the new ELD Match bullets to see how they compare with the best hollow point jacketed bullets from other manufacturers.
MORE TECHNICAL DETAILS
* Hornady’s Chief Ballistician Dave Emary authored a technical report based on the Doppler Radar testing of a variety of tipped Bullets. CLICK HERE for Emary Report. Here are some of the report’s key observations and conclusions:
After early testing of prototype bullets it was observed that all currently manufactured tipped projectiles’ drag curves were convex, not concave and that abnormally low ballistic coefficients were being observed over long ranges. The drag was rapidly increasing at high velocities.
At this point extensive testing was done with all types of commercially-available tipped projectiles. They all exhibited this behavior to a greater or lesser extent depending on their ballistic coefficient and launch velocity. Most projectiles exhibited BCs relatively close to published values for 150 to 200 yards of flight. Beyond these distances they all showed BCs substantially below published values.
It was obvious that something was changing in the tipped projectiles to cause a rapid increase in drag at higher velocities. The drag increases were most noticeable from 100 to about 500 yards. Drag increases stopped at velocities below approximately 2,100 fps. This behavior was not observed with hollow point or exposed lead (spitzer) style designs. The problem magnified as the velocity was increased. The problem was worse for heavier, higher-BC projectiles that maintained higher velocities longer. After some consideration the answer was obvious and one that several people had wondered about for some time but had no way to prove their thoughts.
The tip of a bullet at 3,000 fps will see temperatures as high as 850 degrees F and decreasing as
the bullet slows down. These temperatures on the tip were a known fact. What wasn’t known was how long it would take at these peak and decreasing temperatures for the polymer tips to begin showing effects, if at all. As it turns out it is within the first 100 yards of flight. Currently-used polymers in projectile tips begin to have properties like rubber at approximately -65 to 50 degrees F and will melt at 300 to 350 degrees F, depending on the exact polymer.
All current polymer-tipped projectiles have tips that are at best softening and deforming in flight and under many circumstances melting and badly deforming. To cut through a lot of technical discussion the problem becomes worse at higher ambient air temperatures (summer) and higher launch velocities. Projectiles that have a high BC and retain velocity well see higher stagnation temperatures for longer lengths of time and have greater degradation of the tip. Simply put it is a heat capacity problem –temperature times time. This makes BCs for current tipped projectiles a rough average over some distance, dependent on atmospheric conditions and muzzle velocity, and does not allow the accurate prediction of downrange ballistics much beyond 400 yards.
At the recent IBS 600-Yard Nationals, the 6mm Dasher cartridge was the most popular chambering for both Light Guns and Heavy Guns. The Dasher, a 40° improved version of the 6mmBR Norma case, can definitely shoot — no question about that. But the Dasher has one less-than-ideal feature — its very short neck. This makes it more problematic to shoot a wide variety of bullet types — short bullets as well as long. In addition, the short neck makes it harder to “chase the lands” over time.
For those folks who like the performance of the 6mm Dasher, but prefer a longer neck, there is an excellent alternative — the 6mm BRDX. This wildcat shares the 40° shoulder of the Dasher and has nearly the same capacity. Like the Dasher, the 6 BRDX can drive 100-107gr bullets to the same 3000-3050 FPS accuracy node. But the 6 BRDX has a longer neck than the Dasher. Depending on your “blow length”, the 6 BRDX will typically give you about .030″ to .035″ more usable neck length. That may not sound like much, but it is very useful if you have a longish (.110″+) freebore and you still want to shoot shorter bullets in the lands for some applications.
Your editor has a 6mm BRDX and I really like it. The neck is long enough to let me shoot 90-grainers loaded into the lands as well as 105-grainers. Fire-forming is pretty easy. I just load very long (so there is a firm jam) and shoot with 30.0 grains of Varget and a 100+ grain bullet. With a Brux barrel, my BRDX easily shoots quarter-MOA, with some 100-yard groups in the ones in calm conditions. This is with a Stiller Viper Action, and Shehane ST-1000 stock bedded by Tom Meredith.
6mm BRDX Reamer, Dies, and Hydro-Forming Service
It’s not difficult to set up a rifle to run the 6 BRDX. Dave Kiff’s Pacific Tool & Gauge has the reamer (just tell him the freebore you want). Whidden Gunworks offers excellent BRDX sizing and seating dies. And if you don’t like fire-forming, give Darrell Jones of DJsbrass.com a call. Darrell can hydro-form 6 BRDX brass and even turn the necks to your specs. Darrell’s hydro-forming service saves you time and preserves precious barrel life.
Here’s a valuable web resource our readers should bookmark for easy access in the future. ShootForum.com offers a vast Bullet Database, which includes roughly 3900 bullet designs in all. We counted nearly 200 different 6mm bullets! The bullet info comes from the makers of QuickLOAD Software. Access to the online database is FREE. Most database entries include Caliber, Manufacturer, Stated Bullet Weight, True Bullet Weight, Length, Sectional Density (SD), and Ballistic Coefficient.* In many cases multiple BCs are provided for different velocity ranges.
In our 
Neck-Wall Thickness is Important Too
