What do you get when you cut a 6.5 Creedmoor-chambered barrel down to just over 16 inches? A lot more velocity than you might think. Our friends at Rifleshooter.com recently did a barrel cut-down test with 6.5 Creedmoor test rifle, shortening the barrel from 27 to 16.1 inches in one-inch increments. Surprisingly, with a 142gr Sierra MK, the total velocity loss (as measured with a Magnetospeed) was just 158 FPS, an average of 14.4 FPS per inch of barrel length. With the lighter 120gr A-Max bullet, the total velocity loss was 233 FPS, or 21.8 FPS average loss per inch of barrel.
Test Procedure
Five (5) rounds of each type of cartridge were fired at each barrel length and the velocity data was recorded with a MagnetoSpeed V3 barrel-mounted chronograph. The rifle was then cleared and the barrel was cut back one inch at a time from 27″ to just over 16″. NOTE: During this winter test, the air temperature was a very chilly 23° F. One would expect higher velocities across the board had the outside temperature been higher.
The photo below shows how the barrel was cut down, inch-by-inch, using a rotary saw. The barrel was pre-scored at inch intervals. As the main purpose of the test was to measure velocity (not accuracy) the testers did not attempt to create perfect crowns.
6.5 Creedmoor vs. Other Mid-Sized 6.5mm Cartridges
The 6.5 Creedmoor is a very popular cartridge with the tactical and PRS crowd. This mid-size cartridge offers good ballistics, with less recoil than a .308 Winchester. There’s an excellent selection of 6.5mm bullets, and many powder choices for this cartridge. When compared to the very accurate 6.5×47 Lapua cartridge, the 6.5 Creedmoor offers similar performance with less expensive brass. For a tactical shooter who must sometimes leave brass on the ground, brass cost is a factor to consider. Here’s a selection of various 6.5 mm mid-sized cartridges. Left to right are: 6.5 Grendel, 6.5×47 Lapua, 6.5 Creedmoor with 120gr A-Max, 6.5 Creedmoor with 142gr Sierra MK, and .260 Remington.
When asked to compare the 6.5 Creedmoor to the 6.5×47 Lapua, Rifleshooter.com’s editor stated: “If you don’t hand load, or are new to precision rifle shooting, get a 6.5 Creedmoor. If you shoot a lot, reload, have more disposable income, and like more esoteric cartridges, get a 6.5×47 Lapua. I am a big fan of the 6.5×47 Lapua. In my personal experience, the 6.5×47 Lapua seems to be slightly more accurate than the 6.5 Creedmoor. I attribute this to the quality of Lapua brass.”
At the request of our readers, we provide select “Deals of the Week”. Every Monday morning we offer our Bargain selections. Here are some of the best deals on firearms, 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 — Major Brand Blem Bullets (.204 to .50 Cal)
Right now Midsouth Shooters Supply is running a big sale on Major Brand Blem Bullets. You can save 50% or more on a wide variety of bullet types and calibers. Whatever your preference — Poly Tips, BT Hollowpoints, Soft-Points — you’ll find something on sale. In all 42 types of bullets, from .22 to .50 caliber, are deeply discounted. Here are just a few of the great deals we found:
.204 (20 Cal) 45gr SP, $17.06 per 100
.224 (5.56 mm) 55gr SP, $9.53 per 100
.243 (6 mm) 87gr BTHP, $15.08 per 100
.264 (6.5 mm) 120gr Poly Tip, $18.54 per 100
.308 (7.62 mm) 195gr BTHP, $22.96 per 100
.338 (8.58mm) 225gr Poly Tip, $27.22 per 100
2. Grafs.com — Magnetospeed Sporter $179.99
If you have been waiting to get a Magnetospeed… wait no longer. Priced at just $179.99 at Grafs.com, the Magnetospeed Sporter model costs less than half as much as Magnetospeed’s V3 models. This chronograph attaches directly to your barrel so you don’t have to go downrange to position tripods and set up skyscreens. For most people the Sporter Model contains all the features they need. Using Magnetspeed’s XFR adapter (sold separately), data can be transferred easily from the display module to your mobile device. READ Magnetospeed Sporter Review.
3. Bruno’s — Once-Used Nightforce Scopes, Save Hundreds
Bruno Shooters Supply currently offers six (6) Nightforce targets scopes that were used one-time-only at the Cactus Benchrest match. These were “previewed” for evaluation on a rifle but are virtually brand new. And yes they come with full factory warranty. Choose either the 15-55x52mm Comp model or the NEW fixed-power 42x44mm scope, with either Fine Cross Hair (FCH) or Target Dot Reticle. You can save some hundreds on these scopes. For example, the 15-55X scope is offered at $2125.00, compared to the $2352.00 normal price at other vendors. That’s a $227.00 savings.
4. CDNN Sports — Ruger American Ranch Rifle (Tan), $389.99
Here’s a nice little varmint rifle from Ruger with some nice features at a very attractive price, $389.99. This .223 Rem rifle features a 16.5″ hammer-forged barrel barrel threaded 1/2″-28 at the muzzle for brake or suppressor. The action, which features a 70° three-lug bolt, and Picatinny-style scope rail, sits in an aluminum bedding block. The crisp trigger adjusts down to 3 pounds. With a weight (before optics) of 6.1 pounds, this is a handy carry-around varminter.
5. Natchez — 300 Rounds .45 ACP in Can, $69.99 After Rebate
The classic .45 ACP is probably our favorite handgun cartridge for target work. Inherently accurate, the .45 ACP delivers big, easy-to-see holes on the target. Right now you can get 300 rounds of quality American Eagle 230gr .45 ACP FMJ ammunition for just $69.99 after the Federal Premium MFG Rebate. This Natchez .45 ACP Ammo Deal includes a rugged, lockable Federal Premium plastic Ammo Can.
6. Cabelas.com — Lyman Power Case-Prep Tool, $20.89
This Lyman cordless power tool is now just $20.89, marked down from $39.99. That’s a steal for a tool that handles most case-prep chores. The high-torque rechargeable driver runs at the correct speed for deburring and chamfering. The accessories have hex shafts that snap in and out of the driver (much like with a cordless screwdriver). The kit includes the power unit and seven (7) accessories: two case neck brushes, two double-ended primer pocket tools (large and small), an outside 45° neck-chamfer tool, an inside 30° neck-chamfer tool, and a combo standard/phillips screw-driver bit. Grab one for $20.89 at Cabelas.com.
7. MidwayUSA — Padded Scoped Rifle Case, $24.99
This 48″-long, thickly-padded gun case will hold most tactical-style rifles and hunting rifles. At a fraction of the cost of a big, cumbersome drag bag, this case may be all you need. The heavy duty padding is over 1″ thick on both sides to protect your rifle and optics investment from rough handling. A large pocket will hold a couple boxes of ammo and other accessories. We like this bag much better than the typical gun-store soft cases. It offers much better padding and more room for large scopes. It is on sale this week at MidwayUSA for just $24.99 in four colors: black, tan, OD green, and gray. In addition to the 48″ case shown, 40″ and 44″ versions are available.
8. Amazon — Two Rolls of 3″ Neon Target Stickers, $14.95
We like these bright Neon 3″ target stickers. They are big enough to see easily at 600 yards, giving you a 1/2 MOA target center at that distance. For $14.95 at Amazon.com, you get 250 3″-diameter self-adhesive centers (125 targets per roll) that stick to almost any surface The high-contrast fluorescent red/orange color provides an excellent HI-VIZ aiming point, along with good contrast for bullet holes that fall within the 3″ circle. To help line up your reticle cross-hairs, the target centers feature black markers at 3, 6, 9, and 12 0’clock.
Burris Optics now offers online ballistic tools to help shooters maximize the potential of Burris riflescopes. The new Burris Ballistics Services site offers easy-to-use software and a comprehensive cartridge/bullet library. With these web-based tools you can analyze your reticle, build a dope card, program an Eliminator LaserScope, and order custom elevation and windage knobs. Burris Ballistic Services are provided online at www.BurrisOptics.com/ballistics.
Burris Reticle Analysis Calculator
The Burris Reticle Analysis Calculator allows users to select their ammunition and define exact environmental conditions, such as altitude, humidity, and wind speed. This allows you to plot the exact holdovers/holdoffs shown by any Burris reticle at any distance. Results are customizable and printable.
Dope Card Builder
The Burris Dope Card Builder is a fully-customizable solution for determining bullet performance at any distance. By using the extensive Burris bullet library users can expect very precise and reliable elevation and windage values for their custom-generated drop chart (aka Dope Card).
Data for Nearly 7000 Cartridges and Bullets
Burris has compiled an impressive database for its online software — nearly 7,000 cartridges and bullets are included from every major ammunition and bullet manufacturer. Rimfire, centerfire, muzzleloader and shotgun shells are included, as well as G1 and G7 profiles (where available) for precise accuracy.
Eliminator LaseScope Programming Tool
With the touch of a button, the Burris Eliminator LaserScope will range your target, calculate your needed vertical hold-over (based on your load’s ballistics) and then instantly display a red dot you put right on the target. We’ve used an Eliminator and can affirm that the system works well. For most accurate elevation calculations, you program the Eliminator by entering the Drop value at 750 yards and the Ballistic Coefficient of the cartridge you are shooting. The Eliminator Programming Tool helps you determine the correct Drop Number and Ballistic Coefficient, and lets you fine-tune your results by inputting local environmental conditions.
Custom Knobs
Burris customers can now order custom elevation knobs for many Burris riflescopes. With the online software you can configure a knob for your favorite load and exact shooting conditions (elevation, temp, humidity). You can then submit this knob “blueprint” to Burris and have a custom knob produced.
Wouldn’t it be great if you could quickly and easily adjust shoulder bump during the full-length sizing process, without struggling to move die lock-rings by trial and error (or fiddle with shims). Well you can. The PMA Micro Die Adjuster is a brilliant little device that replaces the lock ring on your FL sizing die. It allows you to move the die up and down in precise, tiny increments. The tool has .001″ index marks, but you can easily set your die between the marks to achieve .0005″ (half-thousandth) adjustments.
To see how the PMA Micro-Die Adjuster works, watch this video by our friend Boyd Allen:
Many of our Forum members now use the PMA Micro Die Adjuster, and they give this specialty tool high praise. Here are actual reviews by Forum members and other verified tool buyers. Read more comments in this AccurateShooter Forum Thread.
PMA Micro Die Adjuster User Reviews
“No more ‘close enough’ for headspace[.] With this tool set-up it’s easy to put headspace exactly where you want it, then repeat it exactly for subsequent batches for the same cartridge.” — JohnF
“I have four of these Micro Adjuster rings and all I can say is that it works and it is repeatable. I bump my brass .0005″-.001″ and this die lock ring will do it without issue.” — TrapperT
“I size brass for four different 6.5×47 rifles (chambered with three different reamers) using a single die, set in the PMA Adjuster. I have to say… I should have bought one sooner. Adjusting it is very quick and repeatable to well under .001.” — /VH
“Great product. Shims used to drive me crazy, put a .002 in and get .0035 of change. With this if you want .0015 set it and that’s what you get.” — John B
“I’ve been using PMA’s lock ring for some time now and find it to be very easy to adjust to within .0005″ on a single piece of brass. Very quick to do as well. One thing I have found is that if you still need that half-thou adjustment I will run the brass once more at the same setting before I make that .0005″ adjustment and 50 percent of the time that does the trick. The marked increments are in .001″ scale so if you go half way in between there’s your half-thousandth.
PMA Micro-Adjuster vs. Shims: With respect to using shims, that requires you to completely remove the die. That gets old rather quickly after having used the PMA adjustable lock ring.” — Patch 700
“I like mine — adjustments are easy and it will adjust very fine. I used to use .001″ shims. Now can adjust my bump as fine as I want.” — Joe139
“The PMA adjuster works just like they say it does and is very simple to use and adjust. I use JLC inserts as well … as nice as they are you’re still hobbled by a click. However with the PMA you can go between what would be clicks. And you can use them … with any die.” — Dusty Stevens
Product Description from PMA Tool
The PMA Tool Micro Die Adjuster (MDA) replaces your existing lock ring and can be used with nearly any 7/8-14 full length sizing die. We successfully used this tool with sizing dies from Redding, RCBS, Hornady, Lee, Harrells Precision and those made from Newlon Precision die blanks. It allows you to easily make adjustments to your “shoulder bump” as fine as .0005″. The engraved marks on the MDA are equal to approximately .001 inches (true adjustment .000992″) of adjustment to the shoulder bump. Splitting the engraved marks is therefore approximately equal to .0005″. The design of the MDA does not allow it to work with the Forster Co-Ax press. Some custom dies for very short cartridges may require the use of an extended shellholder. Micro Die Adjuster shown in use installed on Custom Newlon/Scott 6mm PPC Die and Harrells Precision Compact Press.
Commentary by Dean Weingarten,Gun Watch
In an historic, but extremely short unanimous opinion, the United States Supreme Court has confirmed that the Second Amendment applies “to all instruments that constitute bearable arms,”. As this is an enormous class of nearly all weapons, the decision [could be] applied to knives and clubs, and nearly all firearms that have been sold in the United States. Nearly all types of firearms are more common than stun guns. From nbcnews.com:
“But in an unsigned opinion, the U.S. Supreme Court [on 3/21/2016] vacated that ruling. It said the Massachusetts court improperly found that Second Amendment protection applies only to weapons that were in common use at the time of the nation’s founding.”
Referring to its landmark 2008 D.C. v. Heller ruling on handguns in the home, the justices said the Second Amendment applies “to all instruments that constitute bearable arms,” even those not in existence at the time of the founding.
The unsigned opinion is very short[.] Alito writes a much longer and more forceful opinion in concurrence. It could, and should, have gone much further. None the less, it is an enormous win for Second Amendment supporters, and it extends far beyond stun guns and Massachusetts.
There is strong language in this opinion. If 200,000 stun guns in the U.S. are “common”, it is hard to believe that 5 million AR-15s and millions of other semi-automatic rifles are “unusual”.
The case lays to rest the idea that courts can simply say anything other than handguns are “uncommon” or “unusual” and are therefore exempt from Second Amendment protections. This case will be cited far into the future.
The full, unanimous decision, along with Justice Alito’s lengthy concurrence, is found via this LINK:
What is “Overbore”? That’s a question rifle shooters can debate to no end. This article from our archives proposes one way to identify “overbore cartridges”. We think the approach outlined here is quite useful, but we know that there are other ways to define cartridges with “overbore” properties. Whenever we run this article, it stimulates a healthy debate among our readers — and that is probably a good thing.
Forum Member John L. has been intrigued by the question of “overbore” cartridges. People generally agree that overbore designs can be “barrel burners”, but is there a way to predict barrel life based on how radically a case is “overbore”? John notes that there is no generally accepted definition of “overbore”. Based on analyses of a wide variety of cartridges, John hoped to create a comparative index to determine whether a cartridge is more or less “overbore”. This, in turn, might help us predict barrel life and maybe even predict the cartridge’s accuracy potential.
John tells us: “I have read countless discussions about overbore cartridges for years. There seemed to be some widely accepted, general rules of thumb as to what makes a case ‘overbore’. In the simplest terms, a very big case pushing a relatively small diameter bullet is acknowledged as the classic overbore design. But it’s not just large powder capacity that creates an overbore situation — it is the relationship between powder capacity and barrel bore diameter. Looking at those two factors, we can express the ‘Overbore Index’ as a mathematical formula — the case capacity in grains of water divided by the area (in square inches) of the bore cross-section. This gives us an Index which lets us compare various cartridge designs.”
OVERBORE INDEX Chart
So what do these numbers mean? John says: “My own conclusion from much reading and analysis is that cartridges with case volume to bore area ratio less than 900 are most likely easy on barrels and those greater than 1000 are hard on barrels.” John acknowledges, however, that these numbers are just for comparison purposes. One can’t simply use the Index number, by itself, to predict barrel life. For example, one cannot conclude that a 600 Index number cartridge will necessarily give twice the barrel life of a 1200 Index cartridge. However, John says, a lower index number “seems to be a good predictor of barrel life”.
John’s system, while not perfect, does give us a benchmark to compare various cartridge designs. If, for example, you’re trying to decide between a 6.5-284 and a 260 Remington, it makes sense to compare the “Overbore Index” number for both cartridges. Then, of course, you have to consider other factors such as powder type, pressure, velocity, bullet weight, and barrel hardness.
Overbore Cases and Accuracy
Barrel life may not be the only thing predicted by the ratio of powder capacity to bore cross-section area. John thinks that if we look at our most accurate cartridges, such as the 6 PPC, and 30 BR, there’s some indication that lower Index numbers are associated with greater inherent accuracy. This is only a theory. John notes: “While I do not have the facilities to validate the hypothesis that the case capacity to bore area ratio is a good predictor of accuracy — along with other well-known factors — it seems to be one important factor.”
There’s a chap in New Zealand who has produced some of the most valuable (and well-researched) books on hunting you can buy. Nathan Foster’s Long Range Hunting series of books is a gold mine for rifle shooters seeking verified, first-hand knowledge of the performance of hunting cartridges, plus expert “how-to” advice on field skills, stalking, marksmanship, and ballistics.
Right now, Foster’s company, Terminal Ballistics Research (TBR), is offering Easter Special discounts on its most popular book titles. For starters, as a Easter weekend promotion, you can get 15% off the Practical Guide To Long Range Shooting in paperback or eBook format. This book is chock-full of information that will benefit competition marksmen as well as long-range hunters. You’ll find good advice on use of BDC and Mil-dot reticles, plus extensive sections on ballistics.
Other TBR books by Nathan Foster are on sale as well:
Do you know someone who wants to get started in pistol shooting? Here’s a new opportunity. The NRA now offers its Basics of Pistol Shooting Course in an online format. That makes it easy to cover the “classroom” part of the course on your own time. The $60.00 online course includes 11 step-by-step lessons (to be followed by live range training). CLICK HERE to enroll in online Pistol Training Course.
Train Online, Then Register for a Range Session
For the NRA Basics of Pistol Shooting course, Phase 1 is conducted in an online environment, completed on your own time (cost is $60.00, non-refundable). After successfully completing the online exam, students can register for Phase 2, the instructor-led training session. Phase 2 is conducted at your local range with an NRA Certified Instructor. You must successfully complete Phase 1 and Phase 2 in order to receive your NRA Basics of Pistol Shooting course certificate.
Designed and developed by experts to accommodate busy schedules, the web-based course takes a blended learning approach to firearms training with both online and physical components. Students have 90 days to work through 11 online lessons before registering for Phase 2, the NRA Certified Instructor-led phase at a local range. “America has more first time gun owners than ever and the NRA remains dedicated to being the number one provider of firearm training,” said Executive Director of NRA General Operations, Kyle Weaver. “Thanks to our online courses and network of more than 125,000 NRA Certified Instructors, it has never been easier to learn basic firearm skills.” The NRA offers other online training courses at Onlinetraining.nra.org. These offerings include a Range Safety Office (RSO) course, and a Range Development and Operations course.
After the success of its recent winter Ballistics seminar in Michigan, Applied Ballistics has decided to take its show on the road, offering additional Ballistics seminars in three different states (Texas, Michigan, and North Carolina). These three seminars will cover a wide range of topics, with the primary focus on basic to advanced ballistics principles as applied to long-range shooting. Registration is now open for the three (3) upcoming Ballistics Seminars:
This video explains the subjects covered by Applied Ballistics Seminars:
Ballistician (and current F-TR National Mid-Range and Long-Range Champion) Bryan Litz will be the primary speaker at the spring, summer, and fall seminars. He will present material from his books and the Applied Ballistics Lab, and he will discuss his experience shooting in various disciplines. The seminar will feature structured presentations by Bryan and other noted speakers, but a great deal of time will be alloted for questions and discussion. By the end of the seminar, participants should have a much better understanding of how to apply ballistics in the real world to hit long-range targets. Along with Bryan, other respected experts will include:
Emil Praslick III – Head coach of the U.S. Palma team and retired head coach of the U.S. Army Marksmanship Unit. Emil will discuss tactics, strategy, and mindset for successful wind-reading.
Eric Stecker – Master Bulletsmith and President of Berger Bullets. Eric will be presenting on precision bullet making technology.
Nick Vitalbo – Owner of nVisti Tactical Innovations and chief engineer for Applied Ballistics. Nick will discuss the state of the art in laser rangefinders and wind reading devices.
Mitch Fitzpatrick – Applied Ballistics intern and owner of Lethal Precision Arms. Mitch specializes in Extended Long Range (ELR) cartridge selection and rifle design.
Ballistic Solvers – How they work, best practices, demos.
Weapon Employment Zone (WEZ) Analysis – How to determine and improve hit percentage.
Optics and Laser Technology – State of the Art.
The seminars costs $500.00. But consider this — each seminar participant will receive the entire library of Applied Ballistics books and DVDs, valued at $234.75, PLUS a free copy of Applied Ballistics Analytics software, valued at $200.00. So you will be getting nearly $435.00 worth of books, DVDs, and software. In addition, a DVD of the seminar will be mailed to each attendee after the seminar concludes.
Report by Johnny Fisher
The Civilian Marksmanship Program has just finished temporary installation of 15 traveling electronic Kongsberg Targets at the Oklahoma City Gun Club in Arcadia, OK. These high-tech targets will be employed during the Oklahoma CMP Games, slated for April 6-10, 2016. All the High Power rifle events during this year’s Oklahoma Games will be run exclusively on these electronic targets. Competitors will be scored electronically with match results being processed in real-time. Notably, this means High Power competitors will not have to do “pit duty” the entire week since manual target-pulling and shot-marking is no longer required.
The majority of shooting at the Oklahoma CMP Games will be fired at the 200-yard line for the Garand / Springfield / Vintage & Modern Military (GSMM) matches. However, the electronic targets have also been readied for use in the scheduled Excellence In Competition (EIC) and Vintage Sniper matches. Those events require additional firing from 300 yards and 600 yards.
Electronic Target Technology — How Kongsberg Targets Work
CMP Targets technician Bryan Parris explains what makes these targets so special: “These targets were designed by the experts at Kongsberg Targets exclusively for the CMP to fit the standard US target dimensions of 72″ square target backers. What shooters discern as the black of the aiming bull is actually black rubber sheeting that is the entire size of the backer. A layer of white corrugated plastic then covers this rubber with a center hole having been cut out to reveal the appropriate sized bull for that yard-line. All that is required as competitors move further back through the course is to change out the plastic cover to reveal a larger aiming black.”
This acoustically-scored target system uses four microphones to locate the bullet as it passes through the target. The microphone closest to the bullet traveling through the target actuates the remaining three to triangulate the exact shot location for the scoring system and simultaneously display the shot on the shooter’s monitor.
Behind the coroplast face and inside the foam insulation, the target is wrapped with rubber to form a type of chamber. This helps insulate the target’s four microphones stay insulated from extreme temperature changes and also helps keep out ambient noise. This chamber need only exist to the extent that it separates itself from the other targets. Parris states: “We’re building these targets to last a great long while. They are extremely durable and can have anywhere from 3000 to 5000 rounds fired through them before any maintenance is required whatsoever.”
The entire system can be powered via battery, generator, or combination of both. The target line communicates wirelessly with the firing line computer system for timing courses of fire and recording scores. And of course, there is virtual real-time communication with monitors set up on each firing point to display shot / group location and value.
When fully assembled, each target weighs about 200 pounds. They are a little cumbersome in their current form, but the CMP’s target technicians are “still working some things out [for] potential future travel games.”
Registration Still Open for Oklahoma CMP Games
The 2016 CMP Oklahoma Games will be held at the Oklahoma City Gun Club in Arcadia, OK from April 6 – 10, 2016. Registration is still available. For more information about these Kongsberg Electronic Targets, contact Bryan Parris of CMP Targets at (256) 835-8455 or bparris@thecmp.org.
The unsigned opinion is very short[.] Alito writes a much longer and more forceful opinion in concurrence. It could, and should, have gone much further. None the less, it is an enormous win for Second Amendment supporters, and it extends far beyond stun guns and Massachusetts.
