Correct Airsoft BBs & BB Pellet for your Airsoft Guns. USING PROPER AIRSOFT BBS IN YOUR AIRSOFT. (BASE SPEED IS THE GUN SHOOTING.20g BB's) 300-350 FPS:.20G. Joule Chart for Airsoft Weapon Compliance. Joules and FPS. 0.25g, and 0.28g BB's. If higher BB's are used the chrono will measure as a 0.28g BB.

• Fps To Mph Conversion Calculator

Joule Chart for Airsoft Weapon Compliance This Joule chart will be used at all of Airsoft-HQ games. No non-compliant weapons will be allowed onto the field of play. Joules and FPS: What is the relationship? Many people have asked about the relationship between Joules and Feet Per Second (FPS).

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The mathematical formula for relating Joules to FPS (Velocity) is as follows: 0.5 x MASS (Kg) x (VELOCITY (meters / sec) ) ^ 2 Before plugging your numbers into the formula, you must ensure the following: 1. The weight of the BB is entered in kilograms. For example, a 0.2g BB equates to 0.0002 Kg. The velocity is in meters per second, where one meter equals 3.3 feet. So 30 meters per second equates to 99 feet per second The above table maps energy (joules) to FPS (feet per second) for a 0.2g up to 0.5g BBs. Note that all energy numbers in joules on our site are based on speeds of firing a BB at the weight specified. Obviously, use of heavier BBs will increase the MASS parameter and result in lower FPS as per the formula above.

On our field we will only chrono using 0.2g, 0.25g, and 0.28g BB's. If higher BB's are used the chrono will measure as a 0.28g BB.

Fps To Mph Conversion Calculator

Effective and Maximum Range for 6mm BB's Section IV: Effective and Maximum Range for 6mm BB's Section IV-A: Definitions of Effective and Maximum Range I consider the effective range of an airsoft rifle to be the range at which the BB deviates significantly from the shooter's line of aim. Take the example of a stock Tokyo Marui rifle firing at 0.75 fps with 0.25g BB's. Without hop-up, the BB's would quickly begin accelerating downward, consequently deviating from the shooter's line of aim. A quick estimate from looking at Figure IV-A-01, without hop-up the same rifle would be effective out to about 40 feet. With hop-up properly adjusted for the rifle and same ammunition, the effective range increases to around 100 feet, at which point the BB is roughly 6 inches below the line of aim. (Note that the line of aim is not necessarily a height of 0', nor is it perpendicular to the ground. The reason for this is parallax, which can be better understood by visiting a website that goes into detail about marksmanship.) A shooter could sight their rifle in at a different range, thereby increasing the effective range.

In Figures IV-A-02, 03, & 04, we can see how this factors in for a sniper rifle firing 0.29g BB's at 415 fps. In Figure IV-A-02, the rifle has been sighted in at 130'. In the case, the effective range (taken as the range at which the BB is 6' below the line of aim) is about 170'. Sighting the rifle to 150' increases the effective range to about 180', as depicted in Figure IV-A-03: Lastly, sighting the rifle to 170' increases the effective range to about 190', as shown in Figure IV-A-04: Keep in mind that given the inherent inaccuracy of airsoft, it is very difficult to sight rifles in at long distances.

Additionally, it should be obvious that effective range is not strictly governed by muzzle energy nor the weight of the ammunition used. Further, the skills of the shooter come into play in determining the effective range. The effective ranges listed further down are merely rough estimates. Maximum range was calculated by determining the firing angle that produced the greatest range. While this of no practical use as lobbed shots are in no way accurate, it will give the shooter an idea of how far their BB might travel. Figure IV-A-05 depicts the maximum range of the same 0.29g BB used in the previous example: At maximum range, the BB is moving very slowly, often at a velocity near its terminal velocity (which is explained in ).

At such ranges, the BB will impact with very little kinetic energy, striking with about the same intensity as a small raindrop. In the above example, at a range of 385 feet the 0.29g BB will be moving at roughly 49 fps (or about 0.03 J), not even enough to dent a sheet of paper.

The table below shows shows the firing angle necessary to achieve the maximum range. Note that this is not necessarily 45 degrees. In a vacuum, a firing angle of 45 degrees would provide the greatest range. However, given that the BB falls rapidly during the terminal phase of its trajectory, an angle lower than 45 degrees is necessary to achieve maximum range.

Figure IV-A-06 shows how trajectories vary by firing angle for a 0.20g BB fired at 0.75 J. Section IV-B: Effective Range and Recommended BB Weight Weight is the recommended BB weight necessary to achieve the listed effective range. Modified Muzzle Velocity is the muzzle velocity achieved with the recommended weight BB at the given muzzle energy.

Effective Range is the range at which the theoretical BB fired from a properly tuned rifle will experience significant deviation from the average trajectory, with a maximum deviation of 6' (explained above). These numbers are not absolute; marksman skills (or lack thereof) will either diminish or extend the range. Further, rifles with exceptional consistency between shots can achieve greater effective ranges, as can a shooter by accounting for holdover. Maximum Range is the maximum possible range achievable when using the recommended weight. Keep in mind that a tailwind or higher altitudes / temperatures will allow for a longer ranges.

Maximum Angle is the firing angle that would achieve the maximum range with the listed weight. MED is the minimum engagement distance for the given velocity and BB weight, allowing for a maximum impact energy of 1.00 J.