May 5th, 2017

.22 LR Ammo Performance — ELEY Offers Online Lot Analyzer

ELEY Lot Analyzer online database

How good is .22 LR rimfire ammo you just bought? Well, until now, you had to just cross your fingers and do your own testing (unless you could make the journey to the Eley or Lapua test centers). Now that’s changed. In a matter of seconds, you can access tons of test data for Eley rimfire ammo, seeing how any given lot has performed, and how consistent it has proven. You can view a wealth of data, including group size, percentage of shots within tenths of inches from center, velocity and more. There’s even a 50-shot consolidated group display that conveniently reveals large sample accuracy in a glance. With ELEY’s new web-based Lot Analyzer, you can easily compare various lot numbers, choosing the one that shows the best test results.

ELEY Lot Analyzer online database

With the ELEY Lot Analyzer, simply enter any ELEY lot number into the online database. You’ll then see a heap of information including 10-Shot Groups, 50-Shot Groups, Average Velocity, Ballistics Coefficient, Shot Distribution graphs, and even the Eley Coin Test — the percentage of this lot capable of hitting a dime at 54.7 yards (50m). We believe the ELEY Lot Analyzer delivers the most comprehensive lot-specific ammo performance information ever provided by any ammunition manufacturer.

ELEY Lot Analyzer online database

ELEY is to be commended for making this information available. Shown below are some of the data views available for ELEY Force ammo Lot 3H16-30356:

ELEY Lot Analyzer online database

Try It Yourself with Lot Number 1016-02107
To see how the ELEY Lot Analyzer works first-hand, CLICK HERE and enter this lot number 1016-02107 (be sure to include the dash).

Lot Analyzer Data Available from 2015 Forward
We think the ELEY Lot Analzyer is great for the consumer. It is now possible to select a box of ammo from a store shelf, enter the ELEY lot number, and instantly see the performance of the ammunition. Get together with fellow shooters and compare your ELEY ammo. This service will be available for all ELEY lot numbers in the USA from 2015 forward. You can find the year of your ammunition by the third and fourth numbers in the lot. For example, if your lot number is 3016-30xxx, it is from the year 2016.

EDITOR’s NOTE — Test Center Performance vs. the Real World:
Our staff has tested rimfire ammo in both the ELEY and Lapua Test Centers, and then shot that same ammo later in competition at outdoor ranges. We learned something in the process. First, ammo can do well in a test tunnel, with a clamped test fixture, yet perform very differently outdoors on a real range. Likewise, ammo may shoot superbly in one rifle, yet perform so-so in another rifle, even when the barrels are from the same manufacturer.

We commend ELEY for providing the Lot Analyzer — this really does offer invaluable information to the consumer. This represents a big step forward. That said, you need to understand that factory test results cannot necessarily be duplicated in the real world. And we can confirm that some ammo which was less than stellar in the test tunnel actually shot superbly in real rimfire benchrest competition. LESSON: Even with the ELEY Lot Analyzer, you still need to do your own testing, with your own rifle, to verify .22 LR ammo performance.

Permalink Bullets, Brass, Ammo, New Product, Tech Tip 4 Comments »
May 5th, 2017

Bullet Concentricity Basics — What You Need to Know

Sinclair concentricity 101 eccentricity run-out reloading plans

Sinclair International reloading toolsSinclair International has released an interesting article about Case Concentricity* and bullet “run-out”. This instructional article by Bob Kohl explains the reasons brass can exhibit poor concentricity, and why high bullet run-out can be detrimental to accuracy.

Concentricity, Bullet Alignment, and Accuracy by Bob Kohl
The purpose of loading your own ammo is to minimize all the variables that can affect accuracy and can be controlled with proper and conscientious handloading. Concentricity and bullet run-out are important when you’re loading for accuracy. Ideally, it’s important to strive to make each round the same as the one before it and the one after it. It’s a simple issue of uniformity.

The reason shooters work with tools and gauges to measure and control concentricity is simple: to make sure the bullet starts down the bore consistently in line with the bore. If the case isn’t properly concentric and the bullet isn’t properly aligned down the center of the bore, the bullet will enter the rifling inconsistently. While the bore might force the bullet to align itself with the bore (but normally it doesn’t), the bullet may be damaged or overstressed in the process – if it even it corrects itself in transit. These are issues we strive to remedy by handloading, to maintain the best standard possible for accurate ammunition.

The term “concentricity” is derived from “concentric circle”. In simple terms it’s the issue of having the outside of the cartridge in a concentric circle around the center. That goes from case head and center of the flash hole, to the tip of the bullet.

Factors Affecting Concentricity

The point of using this term is to identify a series of issues that affect accurate ammunition. Ideally this would work best with a straight-walled case; but since most rifle cartridge cases are tapered, it equates to the smallest cross section that can be measured point by point to verify the concentric circle around the center. For the examples below, I’m working with .308 Winchester ammo.

Concentricity run-out cartridge case
Figure 1: The cartridge.

Concentricity run-out cartridge case
Figure 2: Centerline axis of the case, extending from flash hole to case mouth.

The case walls have to be in perfect alignment with the center, or axis, of that case, even if it’s measured at a thousandth of an inch per segment (in a tapered case).

Concentricity run-out cartridge case
Figure 3: Case body in alignment with its axis, or centerline, even in a tapered case.

The case neck must also be in alignment with its axis. By not doing so you can have erratic bullet entry into the bore. The case neck wall itself should be as uniform as possible in alignment and in thickness (see the M80 7.62x51mm NATO cartridge in Figure 5) and brass can change its alignment and shape. It’s why we expand the case neck or while some folks ream the inside of the neck and then turn the outside for consistent thickness, which affects the tension on the bullet when seated.

Concentricity run-out cartridge case
Figure 4: Neck in alignment with center of the case axis.

Concentricity run-out cartridge case
Figure 5: Variations in case neck wall thickness, especially on some military brass, can cause an offset of the bullet in its alignment. This is an M80 ball round. Note the distinct difference of the neck walls.

Having a ball micrometer on hand helps, especially with military brass like 7.62x51mm in a semi-auto rifle, where there are limits as to how thin you want the neck walls to be. In the case of 7.62 ball brass you want to keep the wall to .0145″.

Concentricity run-out cartridge case
Figure 6: A ball micrometer like this RCBS tool (#100-010-268) can measure case neck thickness.

Turning the outside of the neck wall is important with .308 military cases regardless of whether you expand or ream the neck walls. There are several outside neck turning tools from Forster, Hornady, Sinclair, and others. I’ve been using classic Forster case trimming (#100-203-301) and neck turning (#749-012-890) tools for 40 years.

Bullet Run-Out
The cartridge, after being loaded, still needs to be in alignment with the center of the case axis. Figure 7 shows a bad example of this, a round of M80 ball. A tilted bullet is measured for what’s known as bullet “run-out”.

Concentricity run-out cartridge case
Figure 7: An M80 round with the bullet tilted and not aligned with the axis. This will be a flyer!

Run-out can be affected by several things: (1) improperly indexing your case while sizing, which includes not using the proper shell holder, especially while using a normal expander ball on the sizing die (it also can stretch the brass). (2) The head of a turret press can flex; and (3) improper or sloppy bullet seating. This is also relevant when it comes to using a progressive press when trying to load accuracy ammo.

Mid Tompkins came up with a simple solution for better bullet seating years ago. Seat your bullet half way into the case, back off the seater die and rotate the case 180 degrees before you finish seating the bullet. It cuts down on run-out problems, especially with military brass. You also want to gently ream the inside of the neck mouth to keep from having any brass mar the surface of the bullet jacket and make proper seating easier. A tilted bullet often means a flyer.

Concentricity run-out cartridge case
Figure 8: Proper alignment from the center of the case head to the tip of the bullet.

CLICK HERE to READ FULL ARTICLE With More Photos and Tips


*Actually some folks would say that if we are talking about things being off-center or out-of-round, we are actually talking about “eccentricity”. But the tools we use are called “Concentricity Gauges” and Concentricity is the term most commonly used when discussing this subject.

Story Tip from EdLongrange. We welcome reader submissions.
Permalink - Articles, Bullets, Brass, Ammo, Reloading 4 Comments »
May 5th, 2017

NSSF Offers Grants to Boy Scouts of America Councils

BSA Boy Scouts Council Rifle Shooting Grants NSSFThe National Shooting Sports Foundation (NSSF) is pleased to announce the launch of its annual grants partnership with the Boy Scouts of America Councils. Through this partnership, BSA Councils can receive a portion of $100,000 in NSSF-provided grant funds to develop or expand their troop activities in target shooting and marksmanship. Target shooting programs continue to rank among Scouting’s most popular activities, teaching firearms and range safety, teamwork building and fundraising skills.

“This seventh year of supporting the BSA Council Grant Program … brings with it a new level of excitement,” said Zach Snow, NSSF Director, Range Services. “Safety and marksmanship training through the Boy Scouts is a time-honored introduction to the shooting sports. We’re looking forward to increased participation from Scouts pursuing [merit] badges in these activities and then taking those new skills afield for a lifetime of enjoyment.”

How Scouting Groups Can Apply for Grants
BSA Councils wishing to apply for grants should visit the grant guidelines and application procedures at nssf.org/bsagrant. Councils awarded funds through NSSF’s BSA Grant Program must use those grants to purchase of equipment and supplies for their shooting sports activities from an NSSF Member Retailer. The full list of these retailers is available at nssf.org/retailers/find. Examples of qualifying purchases are: ammunition, eye and ear protection, firearms, targets and shooting vests. For more information on this special program and qualifications, contact NSSF’s Zach Snow at zsnow@nssf.org or 203-426-1320 ext. 224.

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