Phone Compatibility – the fact that you could use your iPhone or Android device with it was a bit factor when I chose this. These days you kind of expect this but it’s surprising how many manufacturers neglect it.

These can be worked around depending on the firearm you’re using, many high end precision rifle chassis have rod attachments you can get to mount the Magnetospeed to them to keep them off your barrel.

The unit comes with a lead to transfer information via a data port to a computer, and a charging cable which also attaches to a PC. The Shooting Party recommends the Ballistically Brilliant Chronograph be fully charged before use, and says it can handle velocities up to 2,789 fps. COMPATIBLE: A lightening to 3.5mm adapter (sold separately) is needed for use with iPhone model 7 and newer Skybox chronographs use a “skybox” to measure when the shadow of the projectile passes two points. It does some math and provides velocity information. This is the most common and cheapest type of chronograph since they are easy to make and the tech is pretty simple. Chronos like the Caldwell down below use Skyboxes. Caldwell Chronograph “skybox” design

Precision long range is very velocity dependent. Having accurate data on your ammo is a must-have for proper DOPE. All of the ballistic calculators in the world won’t help if your velocity is off to start with. From cheapest to most expensive, here are the chronographs I’ve tested hands-on! 1. Caldwell Ballistic Precision Chronograph Alternatively, http://www.battenfeldtechnologies.com/ provides direct links to the appropriate apps for the different mobile platforms supported by Caldwell.

Gun buying guide

There really is no excuse for exceeding the legal power limit and that’s where chronographs for airguns are useful kit. Manufacturers go to extraordinary lengths to ensure their products comply, and licensed gunsmiths know that any breach would have serious consequences for their livelihood. (Read our list of the best airgun pellets.) SPECS: Each unit is factory calibrated to within +/- 0.25% accuracy and measures from 5 to 9,999 FPS Avoid shooting over reflective surfaces like snow or some types of sand. May be able to reduce reflection by laying out a large, dark colored tarp under the chronograph setup in such instances. Avoid florescent lighting. Florescent lighting will inadvertently trigger the projectile sensors and give false readings.

For best performance - make sure your device is up to date with the latest software updates provided by your manufacturer and/or carrier. The Ballistic Chronograph app is for use with the Caldwell line of Ballistic Chronographs supporting a 3.5mm (TRRS) line-out serial port.

Although it will handle projectiles weighing up to 49.9 grains and 4,000 fps, the Skan is designed purely for air rifles. Don’t be tempted to use it on your powder burners, as it will damage the sensors. But if you live somewhere that has “weather” or “clouds” then you might get some funny readings now and then. If you take testing your air rifles seriously, you’ll really want to take a look at this chrono which is the last in our list of chronographs for airguns. According to Skan, police forces use a version of the product here to test potentially errant air rifles and pistols. Many airgun manufacturers are customers too. The G2 provides a large area through which to shoot, which is handy as Caldwell recommends standing 10 to 15 feet away, though I’m sure you could get away with being much closer when using an air rifle.

The G2 can also calculate more different types of data. This includes the average velocity, extreme spread, minimum, maximum, and standard deviation. It can also measure 5 to 9,999 feet per second (FPS) like the rest of its Caldwell counterparts. Unlike the Ballistic, G2 has its Bluetooth and SMS (text) features. High accuracy measurement. As the device with high accuracy and clamp rail, and fixed equipment after the every time are the same, and with the guide rail can be made with the mining model in parallel, so the measurement result error is small, small fluctuation dynamic error. Custom Carry Case Designed to store and transport Chronograph, Sunshades, Light Kit and Tripod Constructed of Durable Ballistic Fabric Heavy Duty dual zipper designEASE OF USE: Extra wide sun screens for added shading while outdoors, a large LCD display for easy reading, ¼-20 threaded insert for tripod mounting and an included 15ft aux cord for transferring data to a smartphone or tablet