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Home » Chrono Shootout!  Which One Is The Best and Why You Need One
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CHRONO SHOOTOUT!  WHICH ONE IS THE BEST AND WHY YOU NEED ONE

by Gunner Quinn June 9, 2024
written by Gunner Quinn June 9, 2024 0 comment



WHAT IS A CHRONO OR CHRONOGRAPH? 

In the gun world, a chrono is simply a tool that measures the speed of your
bullet. 


WHO NEEDS A CHRONO? 

In my opinion, all shooters!  Ballistic solver apps are cheap and easy to get
these days and with an app and chrono, anyone can figure out the dope on their
rifle.  Dope tells you how much the bullet will drop at a given distance. You
need accurate data to get good results from the app.  A key part of that data is
the bullet velocity.

Most manufacturers will print that velocity on the box with rifle ammo or have
it available on their website.  Most pistol ammo manufacturers also post the
velocity of a given round.  Many people don’t know those velocities are done
with test barrel fixtures. The speeds will often be significantly different than
the speeds of your gun. Chronos get an accurate velocity for your gun. 

Anyone who wants to shoot a rifle accurately past 150 yards needs a chrono to
get accurate dope. This includes hunters, competition shooters, or anyone
wanting to make long shots.


AVAILABLE ON GUNSAMERICA NOW



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MANY PURPOSES

For the casual pistol shooter it’s probably not necessary but it is still
useful.  Competition pistol shooters need one. In sports like USPSA, IPSC, and
IDPA there are Power Factors which are bullet velocity times bullet weight
divided by 1000.  Power Factors can affect your score (a few points on some
hits) if your bullet is too slow.  Also, you don’t want it to be way faster than
needed, as that adds recoil, affecting your score. 

Reloaders can benefit from a chrono when developing loads for rifles and
pistols.  Most chronos give consistent data like Standard Deviation (SD) and
Extreme Spread (ES).  The lower these numbers are the more consistent your ammo
is.  Reloading generally starts with a published load from a manual.  A chrono
lets you know how the difference between your guns speed and the published load.

In short, not everyone needs a chrono but all shooters can benefit from having
one.




WHICH CHRONO?

There are a ton of chronos on the market these days and I decided to compare a
few of the top models. 

The Garmin Xero C1 Pro 

The Labradar 

the MagnetoSpeed V3 

Older version of the Pact Mark IV timer/chrono combo. 

The Garmin and Labradar both use a form of radar to measure velocity.  This is
often considered the most accurate method.  The Magnetospeed measures changes in
the magnetic field as a bullet passes over the bayonet.  The Pact is old school,
two light sensors see the bullet and calculate the speed using time over
distance.

They all have pros and cons which I will break down for you.


PACT MK IV

I’ve had the Pact for about 20 years.  There are newer versions that I suspect
are better.  Back then it was state of the art; it is a shooting timer with
super high functionality and also a chrono.  It comes with a 24-inch-long metal
rail that the sensors are mounted to.  Each sensor has a cable that plugs into
the back of the unit.  Put the rail on a tripod or other flat surface and start
shooting.

Pros:

 * Accurate and high-tech in its day
 * Also a shooting timer
 * Works well with suppressors
 * No interference from other chronos on the line
 * Can be used with more than 2 sensors for more accurate readings
 * Displays a ton of data beyond SD and ES
 * Durable
 * Recorded 10/10 suppressed shots

Cons:

 * Need a tripod or other way to mount/hold the sensors
 * Less accurate with changing weather
 * Can be affected by clouds
 * Bulky sensor rail
 * Must shoot carefully to not hit the sensors
 * The 20+ year-old Pact read significantly slower than the other chronos. 
   There is a good chance it is out of calibration and needs to be returned for
   recalibration or updates.


MAGNETOSPEED V3

The Magnetospeed is attached to your barrel via a strap.  There is an adapter to
mount it to Picatinny rails as well.  It can be mounted/strapped to a
suppressor.  The unit has a bayonet that sticks out beyond the muzzle and you
use spacers to set it about 3/8” below the barrel exit.  The bayonet is attached
via cable to the display unit.

Pros:

 * Accurate with Suppressors
 * General Accuracy
 * Has an SD card to save multiple sessions and the data can be downloaded
 * Medium size, all items come and fit in a pistol-sized hard case
 * No interference from other chronos on the line
 * Durable
 * Recorded 10/10 suppressed shots

Cons:

 * Only displays ES or SD.  Must go into the menus to switch between them
 * When attached to the barrel it will affect harmonics and accuracy
 * Depending on the barrel, muzzle device, and handguard configurations it can
   be very hard to attach and get accurate readings
 * Lots of trial and error when fitting spacers to get the correct distance
   below the muzzle
 * Switching between the strap and the Picatinny system takes a few minutes and
   is kind of a pain


LABRADAR

The Labradar has been very popular among shooters for a few years since it was
released.  It uses radar to “see” the bullet in flight.

Pros:

 * Highly accurate
 * Lots of data
 * Can give velocity for multiple distances that are set by the user
 * Stores downloadable data on an SD card
 * Can be used with a phone app

Cons:

 * The screen uses a small font and can be hard to read (for dudes over 40)
 * Must be carefully aimed at the target
 * Hard to aim without aftermarket “sight”
 * Requires a tripod or other mount for use
 * Big and Bulky
 * Steep learning curve
 * Very finicky with a suppressor and requires an external mic for use
 * Semi fragile, I keep mine in a large padded hard case to avoid damage
 * Internal AA batteries don’t last long.  External battery bank needed for most
   users
 * When other Labradars are on the line each user must manually set the chrono
   to a different channel
 * Recorded 5/10 suppressed shots with the air gun mic attached


GARMIN

The Garmin chrono is the newest in my stable.  I have used the others for years
but only a couple of months for the Garmin.  Like the Labradar it uses radar to
track the bullet.  It comes with a small 4 inch tripod that you can put next to
your rifle on the ground or bench.  The aftermarket also has mounts to attach it
to your rifle or scope via Arca or Picatinny rail.

Pros:

 * Tiny and light
 * Highly accurate – displays velocity to one decimal
 * 6-hour battery life
 * Only needs to be aimed in the general direction of the target
 * Accurate with suppressors
 * Bright easy to read display
 * Other Garmin chronos on the line do not interfere
 * Works with BB guns, Airsoft, arrows, and almost anything that fires a
   projectile
 * Can be used with the Garmin app
 * Recorded 10/10 suppressed shots
 * Lots of aftermarket support

Cons:

 * Battery not officially user replaceable
 * Not officially rated for use mounted to a rifle.

Garmin’s official position on this. “While Garmin did not specifically design or
test the use of this product to be mounted to a rifle, aftermarket manufacturers
have tested the device mounted to a variety of rifle calibers and the Xero® C1
Pro chronograph has worked without issue. Garmin does not warranty the product
when used in a manner outside of the design content.”


HEAD TO HEAD CHRONO ACCURACY COMPARISON

10 shots were fired through all four chronos simultaneously.

MPA 6.5 CM bolt gun 25 in barrel 147gr Hornady ELD-M / H4350 Powder Chrono
Average Velocity SD ES High Low Suppressed shots registered MagnetoSpeed 2795.0
7.3 23 2750 2727 N/A Labradar 2741.0 7.3 24 2754 2731 N/A Pact 2670.1 4.7 10.7
2675.5 2664.8 N/A Garmin 2736.0 7.9 25.9 2749.6 2723.7 N/A Jakl 5.56mm 13.7 in
barrel 55gr Hornady Steel Match Magnetospeed 2797.0 16.1 43.6 2818 2769 10/10
Labradar 2773.0 10.7 26 2788 2762 5/10 Pact 2719.7 12.5 43.6 2818 2769 10/10
Garmin 2791.9 16.2 53.2 2815.9 2762.7 10/10


CONCLUSIONS:

All the chronos have good and bad points, but for me, the Garmin stands out and
is now my go-to choice to take to the range.  Ease of use, easy-to-read display,
small size and weight, and reliability with suppressors are what make the
difference.

READ MORE: Streamlight TLR-6 HL: Little Light, Big Impact

Not everyone needs one of these expensive premium chronos but I do recommend
that every shooter has some kind of chrono, or at least have a friend with a
chrono.  If you are on a budget there are models available for $100-150.

Every shooter can benefit from chrono data.


GARMIN XERO BONUS SECTION!

This story was finished and ready to publish a few weeks ago, then last week I
had an idea. Garmin also makes a Launch Monitor for golfers. It measures all
kinds of cool stuff like ball speed, club head speed swing path and more. I
though it might use similar technology to track projectiles (balls or bullets).

I brought my Xero chrono to the driving range and had a buddy bring his launch
monitor. The chrono will pick up projectiles down to 100 FPS, which just under
70 MPH. I set the chrono to look for 100-400 FPS projectiles and grabbed my
driver. As I expected it worked! It was showing me the results of ball speed in
FPS, about 210 average. Playing in the menus I found that you can display shots
in MPH as well.

Hitting a variety of clubs with both the chrono and launch monitor running they
gave consistent speeds, usually within 1 MPH of each other. For the average
golfer it should pick up your 8 or 9 iron on the low end up to the fastest
driver of professional players. Some shooters hate golf, but I know a lot of
people that enjoy both and this versatility of the Xero chrono is impressive.


PRODUCT LINKS

Garmin Xero C1 Pro

Gray Ops CNC mount for Xero

Cole-Tac Xero padded bag

Labradar

Arkco Machine Labradar base

MK Machining Labradar sight

Pact Mk IV XP timer and chrono

Magnetospeed V3

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