5.11 HRT Watch with Horus Vision Ballistic Calculator
5.11 HRT Titanium Watch and Horus Vision SureShot Ballistic Calculator. When 5.11 set out to design a Titanium Watch they wanted one that would truly serve the needs of military snipers, law enforcement tactical firearm officers, target shooters and hunters.
Design
They wanted to design a watch that could be used in the tough environments that the intended users operate, which would both be an accurate time piece and also be an aid when making the calculations required to take an accurate long range shot.The HRT Titanium Watch has all of the features normally associated with a watch needed for day to day activities and also includes the SureShot calculator. In a partnership with Horus Vision, makers of proven long range ballistic software, 5.11 have included point of impact software in the Titanium Watch.The HRT Titanium watch has luminescent analog hour, minute and second hands. There is also a digital day, date, calendar and two digital time zones, an audible alarm, an hourly chime and a countdown timer and stop watch. This rugged titanium watch can take a lot of use. The titanium watch pins will withstand a lot of strain applied to the strap and is sealed for 100 meters of water resistance. You are given a controlled backlight so you can see your data when you need it. Also, the luminescent markings can be charged with direct light to give you secure analog reading in the dark.
Ballistic Calculator
As well as telling the time the watch gives you the ability to input thirteen critical variables needed to produce adjustments required for long range shooting solutions quickly and easily. The SureShot calculator gives you point of impact shooting solutions out to 1000 meters. Input your known ballistic data (bore height, ballistic coefficient, muzzle velocity and zero range), then add your environmental data (range, temperature, altitude, inclination) and the SureShot calculator will give you a shooting solution in Mildots ( MILS ), True Minute of Angle ( TMOA ) or Shooters Minute of Angle ( SMOA ). You can even get your solution in clicks for both windage and elevation. The calculator is very easy to use and most of the variables can be put into the Titanium Watch before going out to the field.
Imputing known specific information will allow the Horus Vision ballistic calculator to make an accurate calculation of your bullets trajectory
In order for the 5.11 HRT watch to calculate your bullet’s trajectory correctly, the software needs to know some specifics about your scope, rifle and cartridge. The following information will briefly explain how and why these specifics affect your bullet’s trajectory.
Details
Temperature: As air temperature increases, air density decreases. And as air density decreases it offers less resistance against your bullet’s flight which can affect the bullet’s point of impact. The temperature you input into the watch should be accurate within 3 ° C to the conditions in which you will be shooting.Bore Height: Also called scope height is the distance between the center of your bore and the center of your scope. It is expressed as inches and tenths, e.g. 1.7 inches. It is not the height of your rings. Your scope should be mounted as low as possible to the barrel, but not touching.
Ballistic Coefficient: This is the efficiency of the bullet as it travels through space. This information is available for popular match type bullets from quality bullet manufacturers. It is typically expressed like .533. Some manufacturers provide this figure for different bullet velocities. Select the one that most closely matches your rifle load’s muzzle velocity. Many bullet manufacturers post the Ballistic Coefficient for each bullet on their web site making the internet a great resource for this data.
Muzzle Velocity: This is the speed at which the bullet leaves the barrel of your rifle. This number is the average of a series of bullets fired through a chronograph. Typically a group of 10 shots provides a good average. That number is expressed in feet per second ( FPS ). Typical calibers used by military snipers, law enforcement tactical firearm officers, target shooters and hunters have velocities between 2600 and 3000 fps. Reloading manuals are a great resource for learning more about bullet and cartridge characteristics. You will need to chronograph the load you are using in your rifle.
Zero Range: This is the range at which you have zeroed your rifle. This range is typically 100 or 200 yards.
Display: You have the option of displaying your bullet’s point of impact in Mildots, SMOA or TMOA. 5.11 recommend that you begin with SMOA. Once you understand the concept and application you will be better informed to select between Mildot, SMOA and TMOA.
Clicks: Most scopes have quarter-minute clicks (4 clicks of adjustment within an inch at 100 yards). Some scopes offer eighth minute clicks, while some may even offer half or third-minute clicks. Select the appropriate number of clicks per minute. Check your scope’s instruction booklet. Some manufacturers include this information underneath one of the turret caps.
Units: Select from English or Metric units.
The 5.11 TRH with the Horus ballistic calculator will allow a marksman to make precise adjustments to this Schmidt and Bender PM II in order to engage targets accurately at distant ranges
In order for the 5.11 HRT watch to calculate your bullet’s trajectory with any reliability, your rifle and you need to be capable of “1 MOA” shooting. That is you need to be able to shoot a 1 inch group at 100 yards. MOA means “Minute of Angle” and is approximately 1” at 100 yards. MOA is further expressed as SMOA Shooter’s Minute of Angle ( SMOA ) and True Minute of Angle ( TMOA ). TMOA equals 1.047 inches at 100 yards and increases incrementally each 100 yards. So at 1000 yards TMOA is 10.470 inches. To make the mathematics easier scope manufacturers use SMOA or Shooters minute of angle, which is 1 inch at 100 yards, 2 inches at 200 yards… 10 inches at 1000 yards.
5.11 has partnered with Horus Vision to bring their popular ballistic software to you in a convenient and discreet multifunctional watch platform. Extensive development and field testing ensure that the software works with equal precision in the 5.11 watch. Popular among law enforcement and military snipers, hunters, and long range shooting enthusiasts, Horus Vision’s unique ballistic software enables shooters to accurately calculate their bullet’s trajectory and drop at extended ranges.
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