Tag Archives: beat varget

NEW: Shooters World “Precision” Extruded Propellant: Part 2

Facebooktwittergoogle_pluspinterestyoutube

A brand new propellant was introduced last time in this space that’s competing with Hodgdon’s legendary Varget. HERE’S MORE

precision powder

by Ken Johnson, Shooters World

I presented a challenge to the common sense of the reloading world. In my last blog article, I introduced Precision to the readership. You might call that article a “tickler,” and it certainly generated a lot of questions! When we hear about questions, it means that people are paying attention, reading, and thinking! Good stuff!

Being a ballistician, several of those questions really stood out. I want to address them in this article. I’d also like to present data to support our claims.

First, relating to the burn speed and performance of Precision versus VARGET:

Some folks took the results of one test to state that Precision was 25 fps slower than VARGET. Therefore, they reasoned that it couldn’t have the same performance.

Fair enough. But we have to digest this.

We in the industry estimate a true burn rate differential by witnessing a velocity of 30+ fps at equal pressure. And in some ammunition, 1/10 of a grain can represent a better part of that 30 fps. The performance of Precision and VARGET do fall within the guidelines. Likewise, we found across several test loads, VARGET and Precision exchanged velocity supremacy. This is perfectly indicative of equivalent burn rate.

As an example, you may find the included .30-30 Winchester data and .223 Remington data interesting. These are the same lots of VARGET and Precision. At equal charge weight in .223 REM, Precision is within 26 fps and 955 psi of VARGET. Were we to add back that 955 psi, we’d also add back the better part of that 26 fps. In other words, in .223 Remington, Precision and VARGET the same velocity/pressure relationship.

Now, taking the same exact propellant lots, we performed a cursory test in .30-30 Winchester. At equal charge weight, we found 6 fps and 200 psi difference between the two propellants. And indeed, as we tested these propellants in other calibers, we found similar results.

Thus, we attest that if you like the velocity and charge weight of VARGET, you’ll find very similar velocity and charge weight in Precision.

precision data

Next, folks wanted proof of temperature insensitivity (and no marketing fluff!). And one person in particular wanted to see ballistic data BELOW 165F. So, we shot a test at 150F, to help the readership visualize the relative performance of these two propellants.

A common load for VARGET is the heavier class of .223 REM. We fired a baseline velocity and pressure test at ambient conditions. We found the VARGET ambient velocity from an 18-inch test barrel at 2544 fps. When we shot this same load at 150F, the velocity DECREASED to 2505 fps. The velocity change between ambient and 150F was 39 fps. And the pressure at 150F decreased by 2202 psi.

The Precision ambient velocity from the same 18-inch test barrel at ambient conditions was recorded at 2518 fps. When we shot this same load at 150F, the velocity increased to 2521 fps. The velocity change between ambient and 150F was 3 fps. Pressure at 150F decreased by 562 psi.

Precision’s temperature insensitivity beat that of VARGET, both in pressure and in velocity. Likewise, the velocity standard deviation of Precision at 150F outperformed that of VARGET in our tests.

To challenge both propellants in foreign environments, we further witnessed these same standard deviation results in .30-30 Winchester. Precision had better ignition characteristics than VARGET. And those differences were especially noted when ignition was challenged. What does this matter? Accuracy! The Grand Poobah of all importance.

Now, if you’ve ever read anything by me over the years, you know I’ve made the boisterous claim that weighing your powder to the 0.10 of a grain (let alone a single kernel) is tantamount to trying to teach a pig to sing. Folks, I’m here to tell you that all this craze of “weighing your propellant” to perfection is a waste of time. There are FAR more variables more important than the weight of your propellant in your case. IMHO, powder weight consistency is NOT a key to accuracy. Is it a contributor? Sure. But as long as you’re within +/- 0.2 grains of your intended charge weight, you’re doing pretty well.

Sure, if you’re off by a half a grain, you’ll see a minor effect in accuracy at 100 yards. And you might witness a half MOA shift at 200 yards in some cartridges. But unless you’re actually weighing each and every projectile, and documenting each and every case neck hardness, and measuring and documenting the internal volume of every case, I can tell you that 0.10 of a grain of consistency in powder weight just ain’t gonna matter even a little bit.

So, before I receive flaming hate mail and am declared a heretic in this sport and industry, here’s my statement:

If you’re an accuracy nut who enjoys (REALLY enjoys) shooting PRS matches or NRA High Power Rifle, or even just poking it out to 1,000 yards for fun, your time will be far better spent studying the art and science of MARKSMANSHIP than it will in trickling grains of powder. No, really…

To that end, I took the liberty to DUMP charges of Precision and VARGET in .308 Winchester, 175-gr Sierra Match King loads. I threw caution to the wind, and had at it. Oh — about 42.5 grains of powder, dumped through a Lyman 55 and into some plain-old Norma cases. Federal 210M primers. Fired at 250 yards. Results?

thrown precision results

0.6 MOA for Precision. And 0.49 MOA for VARGET. Could have been better, sure. But how much better do YOU need it to be? Both powders appeared to dump fairly well. And shoot fairly well without even trickling. As a matter of fact, both of those non-weighed groups were some of the best groups I shot. But you just go ahead and keep on trickling those charges! LOL. Just know that some folks are practicing marksmanship, while you trickle your time away….

Okay, what about accuracy between Precision and VARGET? After all, we’re claiming great accuracy with Precision, right?

We completed 6 each, 5-round group tests at 250 yards. This, with a .308 Winchester and 175-gr Sierra Match King bullets. All loads were tested at 42.5 grains of both Precision and VARGET. According to calculations, this charge weight should yield identical velocity with both propellants. Those results:

precision test results

308 and 6.5 precision target

Once we finished that .308 Winchester test, we decided to continue into the 6.5 Creedmoor. It seems that caliber is everybody’s latest darling. And it seems that everybody claims H4350 as the perfect propellant. Our brief test showed that there’s room for other propellants in that particular cartridge! We’re happy to assist…

Precision’s accuracy out-performed VARGET, and H4350, in the 6.5 Creedmoor.

Now, for the next question posed in the blog: Data. When we founded this company, and when we decided to start selling in the reloading market, we knew we had our work cut out for us. I told the partnership that Americans are insatiable for data. And that we’d have to focus for years and years on feeding that need.

Well, here we are. The new kids on the block. And just as sure as the sun rises, we’re being inundated with requests for more calibers, more projectiles, more propellants. The matrix of possible combinations is bewildering. But, we chose the path, so we’re working furiously to meet the demand!

Many folks don’t know that we actually support two data sets for reloading. Both are accessible directly from our home page (www.shootersworldsc.com). The first data set is SAAMI-type reload data. The second set is derived from tests conducted by Explosia under the Lovex brand. That data set is tested to European CIP standards. While there can come ballistic differences due to bullet hardness, cartridge overall length, and bullet form, both data sets are complimentary. And both support reloaders across a myriad of cartridges and propellants.

I do hope that my efforts described in this blog article have helped folks better understand the nature and capabilities of Precision. It’s quite a good powder.

ken johnson

Should you have further questions, or suggestions, our most important job is to listen. We’re always happy to help, and always interested to hear from folks!

Check it out HERE at Midsouth

NEW: Shooters World “Precision” Extruded Propellant: Part 1

Facebooktwittergoogle_pluspinterestyoutube

There’s a brand new propellant on the market that claims to be equivalent to Hodgdon’s Varget, maybe better… READ MORE

PLUS! A Special Offer at the end of the article!

precision powder

by Ken Johnson, Shooters World

Beat Varget? It couldn’t be done. After all, THAT powder has got just about the most fanatical following in the industry.

It was a tall order that we placed on our Shooters World designers and quality assurance folks. Much discussion. Much head nodding, and head shaking, finger waving, white-board writing, graphs, arrows, derivatives and integrals, shoulder shrugging…and time. Much, much time. Trial after trial. Improvement after improvement. That was back in 2014 that we made the first appeal for this powder, this technology, and this burn speed.

We had tasked our manufacturer with the creation of a propellant that would out-perform Varget®. We wanted the same burn speed. We wanted the same density. We wanted easier and more consistent volumetric charging. But most importantly, we wanted superior ignition, and superior temperature insensitivity. We wanted it more accurate.

Shooters World Precision
Shooters World Precision
varget
Hodgdon Varget

Since receiving the early samples of this propellant, and our first production lot, I have made it my A-number-one objective to proof this propellant. If my personal name was to be associated with it, it had to be very, very right.

After what seemed like an eternity, made even longer by my eagerness to get my hands on this new propellant, I have run it through many cartridges. I have charged with it through numerous meters. I have run it at temperatures ranging from -65F to +165F. I have shot it for accuracy. Repeatedly, I have compared it directly to Varget®.

As I reviewed the published charge weights, velocities, and pressures of Precision and compared them to Varget®, there’s very similar performance. When I was directly comparing charge-for-charge, and load-length-to-load length, I found in numerous cartridges and bullet combinations that my ballistic results were within 25 fps of the published Varget® data. Same charge weight, similar pressure. Same charge weight, similar loading density.

That said, keep in mind that I’m an accuracy nut, and I’m not exactly one to follow the herd. I’m an Olympic shooter, and an Internal Ballistic Engineer. I don’t arbitrarily assign a cartridge overall length. If the goal is accuracy, I purposefully set each and every one.

precision testing
Testing has been extensive! Look closely at the chronograph display, and this is why I’m saying what I’m saying about how good this new propellant is!

And as you may know, cartridge overall length (COAL) can and does affect the pressure/charge weight/velocity relationship. It also affects accuracy, efficiency, and barrel life. So, I take it seriously.

One of the advantages of handloading is being able to define your own load length. Knowing this, we further assist the handloader by publishing resultant pressures, velocities, and charge weights, when a specific projectile is positioned very close to the optimal location. Why? Because it’s all about hitting the target. FIRST you’ve got to hit the target, only then you should concern yourself with velocity.

Our load lengths are purposeful. And because of that, as well the inherent (small, but significant) variations in testing results from barrel-to-barrel, our data is not an exact match to that data published by other companies. But rest assured, if you’ve got a SAAMI or NATO chamber, know that Shooters World reloading data is optimized for your chamber and/or your system. If you’ve got a European CIP chamber, know that we also support those chambers and cartridges with European load data too!

Some folks believe that “Temperature Sensitivity” is something that you sprinkle into propellant as it’s being made, like an ingredient. I’m here to tell you, there ain’t no “throw a couple scoops of Insensitivity-Pixie-Dust into the powder vat,” any more than there’s laces for your trigger shoe. Nope. Temperature insensitivity has everything to do with how the propellant burns before the system hits max pressure. That’s it. That’s the secret. And there’s no “secret sauce” that is going to change that fundamental principle.

precision propellant graph
Actual temperature data fired in .308 Winchester/168 Sierra MatchKing at various temperatures against Varget.

In validating Precision against Varget®, we used this fundamental principle in our testing. We took both Varget® and Precision out of their intended “happy place” and forced them to perform in numerous environments where they should fail. These methodologies will remain proprietary to Shooters World. But please understand that our boastful claims of superior temperature insensitivity and velocity standard deviation are founded on real-world results in overly demanding environments.

And it’s this combination of know-how, propellant technology, and shooter-to-shooter empathy that makes us different. We shoot. And we know shooting. All the load building work we do is tedious, but through virtuous and diligent work, we hope you find our products, services, and data the best.

shooters world logo

Want to give it a try, and skip paying the HAZMAT? Just buy 4lbs of ANY Shooters World Powder, and get FREE HAZMAT on your ENTIRE ORDER!

Check it out HERE at Midsouth

ken johnson

About the author: Ken Johnson works with Shooters World in the capacity of Ballistics Managing Partner, Laboratory Manager, and Ballistician. In addition, Ken has had a long and distinguished career as a championship shooter both with the USAMU and USA Olympic Team, having won numerous gold, silver, and bronze medals in the Pan American Games, World Championship, and other international events, as well as national championships at Camp Perry.