How to Make Your Own MGRS / USNG Maps

To do good land navigation, you really need the MGRS grid overlay. UTM is too clunky, and Lat/Long is just a total non-starter. The civilian version of MGRS is called USNG, the only difference being that there are spaces at natural points in the grid. For example, if the MGRS grid is “13SDC23564332”, the USNG is “13S DC 2356 4332”. Simple enough. Unfortunately, it has traditionally been difficult to get MGRS maps outside of the military and whatever areas they deemed fit to print maps of. Enter GISsurfer, a free service based on GIS that allows users to create their own MGRS maps. You can even overlay satellite and roads if you wish. Let’s jump in: 
      1. Go to GISsurfer.
      2. Click “Menu”
      3. Click “UTM MGRS/USNG Lat/Long”
      4. Click either “MGRS” or “USNG” Screen Shot 2019-11-16 at 7.03.40 PM
      5. Zoom to wherever you want a map.
      6. Select other GIS options, such as satellite, roads, contour lines, or the like. You end up with a map, in this case zoomed up so that each gridsquare is a kilometer. Nice.
      7. The final step is to save the map. On an Apple, I can choose File–>Print, choose paper size and layout, then “Save as PDF.” Your mileage may vary.
Happy hunting, and remember your panic azimuth.

Homemade Rifle Barrels Using Electro-Chemical Machining



This is a followup on yesterday’s post. While I surely have the technical ability to pull this off, I just don’t have the time. I’m curious to hear from any readers who have experimented with this.

Gear Review of the P-14 Gen II+ Night Vision Monocular

3.8 / 5.0

Pros: Excellent value. Near parity with PVS-14 during high illumination. Can use AA or CR2 battery. Couples well with IR lasers for night shooting.

Cons: Only partial PVS-14 BII compatibility, and no company-provided BII.

Bottom Line: This is night vision for the masses. I liked it enough to buy the test unit.

The PRG (Potomac River Group) P-14 flashed across my radar one morning as a deal on Dvor, $750 for Gen II+ night vision. I was intrigued, along with quite a few other people. A few emails later and PRG sent one my way to test. My testing consisted of walking around, shooting, and taking pictures through the unit. What else could you do?

Looks like a bargain basement PVS-14, and pretty much is (in a good way)

As an experienced night vision user can see, this unit is meant to occupy the same niche as the PVS-14, except for the frugal. With the typical PVS-14 costing $3000, the P-14 is very attractive at $1000 or less. Of course, the market is full of cheap night vision that is so ineffective as to not be worth it at any cost. I have used numerous of the sort of units people buy for $500 or less at sporting goods stores, and found that they are worse than paperweights — the user can’t see anything, but they destroy the wearer’s natural night vision for the following 30 minutes or so.

The P-14 boasts some impressive features. Gen II+, a very low price, made in the USA, automatic brightness, an IR illuminator, and at least the appearance of PVS-14 compatibility. What’s the catch? Well, that’s the point of my testing and review.

P-14 Performance

The last time I wore anything other than Gen III was 14 years ago when I briefly used PVS-7s in a schoolhouse setting. For Gen II+, I read what to expect from other night vision experts: near parity with Gen III under good illumination, and near uselessness under low light. That is exactly what I found.

On a walk through the woods with 0% illumination, I had to use the IR flood light to make any sort of movement. The unit alone was almost worse than nothing. I couldn’t make out branches about to swipe me, yet the night vision eye was useless.

Toyota pickup under partial illumination from ambient light. 40 meters.

On the other hand, during 100% illumination (full moon), the P-14 image quality was only slightly worse than the Gen III PVS-14. On that particular night, I could make out trees, terrain, structures, and animals at several hundred meters. Additionally, shooting with the P-14 was a breeze. A friend and I used a Streamlight TLR-2 IR laser on a 9mm XDM. Shooting 8″ plates with this combo was almost comically easy. At one point my friend had a target at 10 meters and another target at 50 meters and alternated most of a 19-round magazine between each target without miss.

Pup at 25 meters. Treeline is at 150-200 meters.

When I wore PVS-14s on a near nightly basis, I didn’t worry much about the illumination level. If it was good, that was all the better. With the P-14, the illumination level, and the moonrise and moonset matter. That isn’t PRG’s fault, it’s just a fact of life for Gen II+ tubes. However, potential buyers should be aware of this performance gap between Gen III and II+ tubes.

House and barn at 250 meters.
Creek crossing at 25 meters. Poor focus. Far treelike is on the order of 500 meters.

The P-14’s automatic brightness feature works well. Though I prefer manual brightness control in general, I never had a problem with the unit not adjusting well. Additionally, the onboard IR flood light did a good job of illuminating the immediate area.

PVS-14 Compatibility

When I saw the pictures, I was really hoping that the P-14 would act like a drop-in replacement for the PVS-14. That way, those of us who own PVS-14s can also have the P-14, and both units can use common basic gear. The P-14 works with PVS-14 gear to a large extent. The J-arm screws in to the P-14, but it doesn’t keep the unit from swiveling. As long as it’s tightly screwed, it’s not a problem. The P-14 doesn’t have the same automatic shutoff that the PVS-14 has when the unit is swung upward by the user.

It fits my existing PVS-14 gear reasonably well.

The P-14 works with my DSLR camera adapter for PVS-14s, but only if I add a bit of padding to the eyepiece ring. The eyepiece ring of the P-14 is just not quite big enough, so the adapter tends to work loose off of it. It is in no way a deal-killer, but I’d rather the ring just match the PVS-14 standard. Why not?

P-14 Quality

The P-14 does not feel like flimsy junk. I think it could take a little kicking around. It’s stamped Made in the USA. The rep told me the unit is made in Arizona. I’m not sure precisely what that means. While I think PRG is a company with integrity and does make the units in Arizona, that doesn’t necessarily mean all the glass and the tube is also made in the USA. I have no idea where each component is made.

I walked in the unit during a light mist without trouble. There is some distortion at the outside edge of the lens. Overall the quality seems to be present. Time will tell.

One Caveat…

I am fairly enthusiastic about the P-14, so much so that I went ahead and bought the test unit to serve as a backup or loaner. My one caveat is that I can’t vouch for the reliability of the P-14, nor the tube longevity. Tubes are known to last anywhere from 2,000 to 10,000 hours, and I have no idea how long this will last. I will certainly update the review if it fails prematurely.

Precision Rifle Matches

I’ve been shooting local precision rifle matches to hone my craft. I completed the second match two weekends ago. If you are near Navasota, Texas, check out TX Precision Matches. They hold matches the second Saturday every month. Shooters need $50 and 100 rounds.

The shooting is challenging, and humbling. The target size is 1-4 MOA, with 2.5 MOA or so being the average. The match features 8 stages. Each stage is 105 seconds, and 8-12 rounds fired. The match typically runs from 0830-1500. The target range is from 350 yards to 1100 yards, with a typical target being at 500 yards. Most shots are from non-prone positions.

TX Precision indexes shooters’ scores off of the leader in your division. The leader gets a 100%, and other shooters get percentages of the leaders score. If the top score in a given division was 60, and a shooter scored a 45, then his score is 75%.

I can’t recommend enough that you go to these local matches to skill build. The shooters are incredibly helpful, and will shepherd first timers through the whole match. Come prepared to be humbled. You probably won’t score well your first few outings. No, it doesn’t mean you suck. It also doesn’t mean that the sport is stupid. It’s a great chance to learn alternate positions, rapid wind calling, and applying the fundamentals under severe time stress.

The divisions are Marksman, Expert, and Pro for bolt guns. Gas guns are a separate division. A look at the scores shows why. I’ve always known from personal experience that bolt guns are more accurate than gas guns, but the low gas gun scores surprised me.

Carbine Drop Charts

Here I will post hold over/under charts for common carbine calibers. The point here is so that users can stretch the range on SBRs, submachine guns, pistols, and carbines. For more information on muzzle velocities out of various barrel lengths, check out Ballistics By The Inch. Of course, I modeled the trajectories in Sendit Ballistics.

9mm, 16″ Barrel

This chart is for a 124gr 9mm fired out of a 16″ barrel. The zero is 25, with re-zero at 80 meters.

5.56mm, XM193, 16″ Barrel

This chart is for a 55gr 5.56 fired out of a 16″ barrel. I used a 30 meter zero, because it re-zeros at 300 meters.

Sendit Ballistics

Check out Sendit Ballistics for iOS if you are interested in an accurate, simple bullet trajectory calculator. I keep an updated page on the app here. The app is so accurate because it models the most important 3 degrees of freedom with painstaking detail. The app is designed for the field user, with a simple interface, range card mode, low light mode, and rapid corrections with minimal information. It is free to 400 meters, and only $4.99 to infinity.

Mountain Guerrilla: Drill-Building for Skill-Building

Balance in training is key. You should drill fundamentals and incorporate more realistic and force-on-force work. Be wary of trainers that suggest ditching square ranges. Likewise, understand the square range is crawl/walk; you need further drills for the run phase.

MG Article

INTRO:

It’s become something of a cliché, in the training world, to point out that “Life isn’t a square range!” The implication—and sometimes it’s not even implied, but violently explicit—being that if you’re doing fundamentals work with your weapons, you’re going to die, because your training isn’t “real” enough. I’ve always found this ironic, since in my experience, the ability to actually hit what the fuck I was shooting at, on demand, as many times as I needed to shoot it, was THE defining factor in success in a gunfight. Where did I learn to do that? On the fucking “square range!” Admittedly, they were actually, usually rectangular, but…

Windage Field Constants for Common Rifle Calibers

For the benefit of the rifle shooting community, I have created this table of common calibers’ wind constants. If you’d like to see another bullet on this table, just post the request in the comment section, and I will update the table (weight, G7 BC, and MV would be helpful). I have gotten it kicked off with 6 common calibers. I made this table using my highly accurate ballistics calculator, Sendit Ballistics. The table is right below. Further explanation is below the table.

You better have some way of getting on paper in this atmospheric shit-storm.

Corrections Table

CaliberRanges Valid To (m)Wind Constant (mil, meter, mph)Wind Constant (moa, yard, mph)
5.56mm, M193, 55gr FMJ, 600206.4
5.56mm, M262, 77 gr BTHP, 2740fps MV800278.6
5.56mm, M855, 62grn FMJ600237.3
6.5mm (CM), 140grn ELD-M10004514.3
7.62mm (300WM), Mk248Mod0, 190gr BTHP11004414
7.62mm, M118LR, 175gr BTHP, 2600fps MV8004012.7
.22 LR, 40gr CCI Mini-mag, rifle40082.5

Having a windage field constant in your back pocket is a great thing for serious shooters. A field constant means a single number which helps you come up with corrections based on a full value wind, and the given range.

The concept of a wind constant works on the following equation:

Meter Line * Windspeed / Constant = Correction

EXAMPLE: 5.56 62grn at 400 meters (meter line 4),
in a 6mph wind. Want MOA correction.

1. Constant = 7
2. Correction = 4 * 6 / 7 = 24/7 = 3.5MOA
  • Meter Line is in hundreds, i.e. the Meter Line for 500m is “5”
  • Windspeed is full value, interpolate for half values
  • Constant is in such a unit that it gives you the desired correction

I made the table with two types of constants. The first row is for shooters who desire a mil correction, with meter distances, and mile per hour winds. The second column shows MOA corrections, for shooters shooting in yards, and using mile per hour winds.

You will notice that some of these constants are non-rounded numbers. I decided to err on the side of giving the rifleman the most information. If you don’t like “27,” you can make the call to round it to “25.”

Methodology

The wind constant calculations are pretty much pure analytical science. I used the ballistics engine in Sendit Ballistics to produce the corrections for the given bullet and wind parameters. From there, it is simple algebra to calculate the wind constant (see the simple equation at the top of the page, we need to know 3 numbers to find the 4th). I modeled the wind constant at every hundred meters, and at 5, 10, and 20mph for each cartridge.

Past those calculations, there is some art involved. I first average all the wind constants to get a baseline number. This number is typically too low. The wind constants change drastically from 100m to 1000m. The constants are higher at shorter ranges, meaning that ultimately they produce smaller corrections for the riflemen in the field. Of course, the small wind constants at long range produce corrections which are too big at medium ranges. The key is to pick a reasonable range for the given cartridge, and then select a wind constant that will give adequate coverage for both medium and long ranges for that cartridge. It’s not too much of a problem if the shooter overcorrects by a large amount at shorter ranges; it amounts to centimeters.

Sendit Ballistics

Check out Sendit Ballistics for iOS if you are interested in an accurate, simple bullet trajectory calculator. I keep an updated page on the app here. The app is so accurate because it models the most important 3 degrees of freedom with painstaking detail. The app is designed for the field user, with a simple interface, range card mode, low light mode, and rapid corrections with minimal information. It is free to 400 meters, and only $4.99 to infinity.

Book Review: Victoria, William Lind

4.7 / 5.0

Bottom Line: Victoria is a teaching tool for 4th Generation War (4GW) students. This book is a very good series of short stories which help readers build an intuition for 21st century and beyond war, which will be 4GW to a large extent.

Review

This book should not be viewed as a novel, although that is how it is presented. It is really a series of short stories, loosely tied together on the theme of a future collapse in the liberal global order. Though the political setting of the book is designed to make Lind’s dedicated fans feel at home, it’s not really important for a serious 4GW student. I’m just as happy studying Hezbollah as I am a movement of traditionalists in the United States, which is the best way to describe the protagonists in Victoria.

The basic pattern of Victoria is to present a seemingly difficult problem, which the protagonists then solve by using a mixed and innovative approach, characteristic of successful 4GW. Lind’s intent seems to be to use each chapter to present a realistic pattern for a future conflict, and to then show how a thinking man would solve it.

In one instance, they defeat local politicians by recruiting friendly media outlets to create a public firestorm. In another, they use WW2 era tanks to make rapid 3GW maneuvers once the danger of air attack as passed. In still another instance, they recruit criminal organizations to set off a bomb near an enemy port, which gives the appearance they have more power than they really do.

Though the book has a loose storyline, it isn’t necessary to read it in order. The book has some value as a reference; the reader can flip back to a chapter that relates to current events or a historical scenario in order to get insight into the power dynamics between the two sides.

Lind’s military background included his part in a very serious attempt to reform the US military in the late 1980s to be a 3rd Generation War force. 3GW is the German Blitzkrieg, Nathan Bedford Forrest, and the US Army in Desert Storm. The point is to break through an enemies lines with speed, and disrupt them at the operational level. According to Lind, the US military generally practices 2GW, which means to bombard the enemy with pre-assault fires, and then assault to take ground.

This background probably explains why Lind seems to strongly eschew 2GW in this book — he figures we have enough examples of it in current events and history and it does not need to be taught. By contrast, the book features a good bit of 4GW, some 3GW, and even a particular scene of 1GW. Part of 4GW also means to use and time the other generations of war to maximum information and strategic effect.

More on Victoria’s Learning Model

I am curious as to whether William Lind intentionally used the experiential learning model (ELM). The ELM is a learning model intended to touch on the primary ways adults learn, and Victoria seems to follow this model to engage as many adult readers as possible.

The Concrete Experience is simply reading an engaging scenario. Observation and reflection is really discussion, and it occurs in Victoria through the dialogue. Abstract Concepts means lecture style learning, and occasionally occurs as during soliloquies by Rumford or Kraft, the two main protagonists. Testing in new Situations is really a practical exercise, and of course cannot occur in a book.

The Bad and Ugly

There isn’t much bad about the book. Parts of it are kind of corny. The storyline is somewhat loose. The depiction of The South is downright cartoonish and grating. I give Lind a pass on this in general, because his portraying nations in stark contrasts allows him to better illustrate subtle 4GW cultural concepts.

Ultimately, this book is a good set of stories that illustrate various realistic 4GW situations. Even the unintelligent will get an entertaining novel out of the deal. Intelligent 4GW students will use this book to build their intuition about 4GW situations, as well as get guidance from the protagonists’ reading lists for further study.