Author Archives: David Bookstaber

A Missing Automotive Niche: Performance Minivans

I prefer wagons to sedans, but my growing family is going to need more space soon.

A minivan would be the obvious step up for increased and accessible capacity, but even the best minivans on the market wallow like boats. It’s as if everyone decided that minivans are for soccer moms who are too distracted to pay attention to handling, or contractors used to driving trucks, so dynamic performance never made it on the list of features for this segment.

It doesn’t have to be this way: Active suspensions have been used for years on luxury vehicles from small sports cars to 3-ton SUVs to provide handling that is both comfortable and responsive. I’ve driven higher-end SUVs with air suspensions or magnetorheological dampers that handle like sports cars.

So what’s wrong with large SUVs? They sacrifice interior space I’d like to keep in exchange for ground clearance I don’t need. And they add weight to provide towing capacity I won’t use.

Please make a large vehicle with the space and ergonomics of a minivan but the handling of a sporty car. I know I’m not the only buyer who appreciates performance, needs more interior space, and will never take my vehicles off-road or towing.

Desert Tactical Arms Stealth Recon Scout Rifle

DTA SRS Covert with IOR and Cyclone

Desert Tactical Arms currently makes the only bolt-action bullpup rifle available in the U.S. Given my love of the bullpup style I was excited to find them, until I saw that their prices start at over $4000. I said, “No way; I’ll wait until someone does it cheaper.” A year went by with no signs of anyone moving to compete in this niche. I did some more research, found a dealer selling them at a 20% discount to retail and, as you can see, finally convinced both myself and a friend to pull the trigger. Pictured here is my SRS Covert (the shorter one) in Olive-Drab Green and my friend’s full-length SRS in Flat Dark Earth.

DTA SRS and SRS Covert
(Of course once you spend $4000 on a rifle you don’t want to cut corners on the scope: Mine carries a $1700 IOR Valdada 6-24x56mm FFP. The other wears a $2200 NightForce 3.5-15×50 FFP.)

The Covert chassis is the bare minimum 26″ in overall length, and is equipped here with a 16″ barrel chambered in .308 with a 1:8 twist — optimal for running subsonic loads as well as the heaviest .308 bullets. The standard SRS has an extended fore-end that pushes it to 32″ long, and is shown here with a 22″ .308 barrel, 1:11 twist.

These rifles are supposed to compete not only in price but also in performance with the finest precision bolt guns on the market: Accuracy International, G.A. Precision, Sako, Surgeon, and higher-end custom sniper rifles.

The DTA SRS has some remarkable features (in addition to the bullpup configuration I love for its compactness):

  1. Quick-change caliber conversion: Using a single torque wrench a barrel can be swapped out in under a minute and replaced without losing zero.  The chassis accommodates conversion bolts and magazines to cover calibers from .243 Win up to .338 Lapua Magnum.
  2. The trigger is the finest I have ever pulled.  It is a single-stage design and is adjustable for creep and weight.  I have mine turned down to 1.5 pounds.  (Granted, I don’t have trigger time on the competition, and many shooters who do claim that Sako and AI triggers are better.  Many also lament the lack of a second stage and adjustable stop.)
  3. All DTA barrels are match-grade Lothar-Walthers.  The rifles have developed a reputation for world-class long-range precision.
  4. Quick-Detach sling mounting points are included everywhere you might want them.

There are some fundamental shortcomings:

  1. The bolt assembly — essentially the only mechanism on the gun that has to move — has a matte finish.  It should have a high-lubricity coating.  I paid ROBAR $65 to coat mine in NP3.
  2. The single-stack magazines are made to very loose tolerances and, given their construction, are absurdly expensive.  DTA charges over $100 for a part that it appears they haven’t spent more than $15 to make.
  3. The butt is hard, and there is no means of adjusting the comb.

Another drawback is that the company is still immature.  I wouldn’t expect sloppiness like the following given the price they are charging:

  1. My barrel arrived with copper fouling.  (Hopefully only “tested,” not “used.” DTA claimed that after test-firing barrels they don’t clean them in case customers want to run the break-in rituals that high-end barrel makers eschew.) [Update: I actually couldn’t get it to shoot under 1.5MOA, and after several range sessions to eliminate any other sources of error returned it. It took them a month, but they finally sent me a new barrel that shoots .5MOA with factory match ammo.]
  2. To date they have included a “test target” with every gun that is just a photocopy of one shot earlier in the year on a different gun and in a different caliber.
  3. They have a few good service agents, but also some very incompetent ones.

Subsonic .22LR Terminal Ballistics and Lethality

.22LR is the smallest firearm cartridge in common use today. Common wisdom holds that it is too weak to use for defense against humans or for hunting any animal larger than a raccoon. However there is some evidence that this cartridge is underestimated.

.22LR ammunition is attractive for several reasons:

As I have noted elsewhere, it is a great round for shooting with suppressors: Because .22LR produces so little propellant pressure and volume, suppressors for the caliber can be made very small and light. Furthermore, there is an abundance of subsonic loads on the market, which allow for nearly silent shooting: When shooting slower loads out of my rifles with an Outback suppressor the only audible sound from the gun is the click of the sear releasing the hammer and striking the cartridge rim. The sound of the lead projectile striking a soft target even a hundred yards away is louder to the shooter. (Note that in moderate weather muzzle velocity has to fall below 1000fps to avoid sonic echoes, which increase in loudness and turn into unmistakable sonic cracks as muzzle velocities cross the speed of sound around 1100fps.)

Guns I have reviewed in this caliber include:

So this is a cheap, fun, and accurate caliber. But is it useful for hunting or defense? This is a subject of endless debate. When it comes to defense, of course, we would prefer to avoid confrontation altogether, and failing that would grab a high-powered rifle or shotgun to stop any aggressor. Smaller guns and lighter rounds are a compromise: you sacrifice power and penetration in order to get something more portable and shootable.

Effects on Humans

Common wisdom has it that .380ACP is “barely” enough bullet to qualify as a defensive handgun round, and anything lighter is more likely to enrage an aggressor than to stop him. My favorite study of this subject is An Alternate Look at Handgun Stopping Power by Greg Ellifritz. He analyzed nearly 1800 shootings during violent encounters and came up with some surprising results:

  1. A lot of the time just shooting at someone is enough to get them to stop, regardless of caliber or whether they are hit. I.e., guns “psychologically stop” many assailants. Based on this observation: It’s more important to have a gun – any gun – than to be caught without one.
  2. Determined aggressors do need to be “physically stopped” (incapacitated), and in that case shot placement is far more important than caliber. I.e., largely regardless of caliber: if you hit an assailant in the head they stop 75% of the time. Torso hits stop them 40% of the time. Put another way: How well you shoot is more important than what you shoot.
  3. However, independent of shot placement, calibers below .380ACP are twice as likely to “fail to incapacitate” as the larger calibers. So yes, there is something to the conventional wisdom that if you’re carrying a gun it should shoot something no smaller than .380ACP.

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All plug-in clocks should have capacitor backups

I just bought the Honeywell RPLS740B Econoswitch, a clever dawn/dusk switch that knows when the sun will be down year-round based on the latitude entered during setup. I’m using it to switch on exterior lights at dusk, saving me the trouble of frequently adjusting the set-point of the mechanical switch it replaces.

One feature I particularly appreciate is its use of a super-capacitor to keep time during power interruptions.

Every plug-in device with a clock should have a supercapacitor time backup. Some use batteries as clock backups, but many more — including expensive appliances like my various ovens — have no backup at all. Unlike batteries, capacitors have an unlimited service life: See this whitepaper on “Supercapacitors for RTC and Memory Backup.”

Review: John Carter 3D BluRay

I haven’t been to a movie theater in years, and I don’t intend to go so long as I can reproduce a more comfortable and convenient experience in my basement for a few thousand dollars — which I can with my high-definition, LED-backlit 3-D screen and surround sound system.

Disney sent me an early release of their quarter-billion-dollar production John Carter on 3D BluRay. Rather than add to the whirlwind of full reviews of the movie, I’ll just make one note and a few random critiques:
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CLEAR internet — Best small-office internet access alternative

I recently setup a new small office. Because it was a lease in a commercial building the usual ISPs — Comcast and Verizon — would only offer us over-priced, overburdened “business” internet services.

Fortunately I had just come across a new ISP: CLEAR, which provides unlimited broadband using 4G wireless. For $50/month we use their portable wireless access point to serve up to 8 devices at 4G speeds. No contracts, no usage limits, no hassles. It has been working without any hiccups for two months now.

For routine business use I would definitely recommend this over the wired alternatives. Comcast and Verizon Business: You’re on notice!

Primary Weapons Systems PWS T3 Summit Toggle Action .22LR Rifle

Here is a subsonic target rifle I built on PWS’s new T3 Summit rimfire toggle action:
PWS T3 with Hogue stock and Outback II suppressor

I acquired the T3 receiver and trigger assembly, shown below, for $500. The beautifully machined bolt and receiver are proprietary, but everything else is compatible with the broad market of Ruger 10/22 accessories. The trigger assembly features a crisp 2.5-pound trigger, and is all metal except for the trigger itself and the convenient extended magazine release lever in front of the trigger guard.
PWS T3 receiver and trigger assembly

I installed the receiver in a Hogue stock. The 18″ barrel came muzzle-threaded from EABCO and button rifled with a 1:9 twist rate: sufficient to stabilize subsonic 60gr Aguila .22 bullets. (The standard .22LR twist rate is 1:16.) Those two components brought total cost for the gun to $750, excluding a scope.
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Should You Buy a Used Car?

Many cost-conscious consumers believe new cars carry an unjustified premium and so, as a rule, only buy used cars. In my experience this is a mistake.

The used car market is astonishingly efficient. Granted, there are significant nominal discounts in the private-party car market, but these are due to information and selection biases: Sellers know more about their car than you, and they are more likely to want to sell a car that is problematic, has been abused, or is otherwise of reduced value. You have to be an expert to overcome that information bias, and even experts need to spend time with each car to determine its fair value. If you’re a car expert with time on your hands you can make money trading used cars. But otherwise you should not expect to find bargains in the used market, and especially not from used car dealers, since they are among the experts who snap up bargains and know the fair market prices. Internet sales have only made it easier for them to capture “market” rates for used cars because the internet allows them to expand their geographic reach. (And it’s not for nothing that used car dealers have a sleazy reputation: They don’t stay in business by offering bargains. One car maven once told me most used car salesmen would sell their own mothers a piece of junk.)

In fact the used car market is often upside down. I have found new-car dealers selling used cars for more than they’re selling the new equivalents! There are probably two reasons for this: One is the persistent idea that “a new car loses x% of its value the moment it’s driven off the lot,” which is no longer true (if it ever was). The second is that new cars, except new models that are in high demand, can usually be bought for much less than MSRP, and often less than dealer invoice. So people go into dealers asking only about used cars because they assume the price on a new car is something close to MSRP when it really isn’t, or that they’ll capture a “used-car discount” you can only get from a private party.

If you want a bargain on a car you’re more likely to get it on a new one, especially if you’re flexible about when and what you’ll buy. You only have to do a little research to find brands and models with factory incentives and excess inventory in your region. Then just call a few dealers, ask for their internet sales manager, and find out where they’re selling relative to invoice. (Do it over the phone or Email so they don’t have the chance to waste your time with song-and-dance sales tactics, and try to reach their “internet sales” guys because those are the salesmen who know that you know exactly what invoice and current incentives are, and that if you buy you’ll be a “low-touch” customer who will help them move inventory without taking a lot of time.) Note that dealers can make money even selling below “invoice” for a number of reasons, so if you want a new-car bargain you’re not getting a competitive quote unless it’s at or less than dealer invoice.

The only reasons to buy a used car are:

  1. You are mechanically savvy, and you have access or time to inspect at a lot of used cars to find the true bargains.
  2. You don’t have enough money to buy the type of car you want to own new.
  3. You have the opportunity to buy directly from a trusted acquaintance (avoiding the information and transaction “spread” you pay buying from an unrelated party)

RAT WORX Hybrid Trigger Mod: The Best AUG Trigger

The RAT WORX HTM “Hybrid Trigger Mod” is a drop-in replacement for AUG and MSAR trigger packs. At $230 (and with an ongoing waiting list) it is the most expensive AUG trigger “fix” I have seen, but it is also by far the best. If you shoot your AUG you should get this trigger pack.

2023 Update: Looks like the evolved version of this excellent enhancement is now the $100 20/20 Precision Trigger Sear Mod.

RAT WORX made the clever design decision to build this upgrade around a standard AR-15 trigger group, which they suggest will allow users to tap the extensive market for AR-15 parts to further customize it. I just put it right in my MSAR and took it for testing.

AUG and HTM Trigger Packs

Trigger weight measured a very consistent 6 pounds. Nominally that doesn’t sound any better than what I found with the Trigger Tamer. But practically there is no comparison: the HTM’s all-metal linkage from the trigger bar through to the sear and hammer eliminates sticking and stacking I couldn’t polish or lubricate out of any previous trigger systems. With this trigger I finally feel confident shooting my MSAR against standard AR-15s. With a 4x optic my test group was able to consistently ring a 200-yard steel silhouette shooting at rates up to 5 rounds per second.