- #Muzzle velocity calculator how to#
- #Muzzle velocity calculator manual#
- #Muzzle velocity calculator professional#
2805 fps – This was his muzzle velocity was out of a brand new barrel (without a suppressor attached).This is the original configuration he tried, because it was the one Surgeon typically makes. He kept really good documentation on the velocities, and here is what he found.
#Muzzle velocity calculator professional#
He regularly shot each barrel length over an Oehler 35P chronograph, which is a professional grade chronograph and one of the most accurate ones made. So we thought it’d be helpful to share what he found. So he was expecting 100 fps loss, but that is not what happened.
#Muzzle velocity calculator manual#
The new Berger Bullets Reloading Manual said you could expect a change of about 25 fps per inch (see excerpt image). He mentioned that he’d searched online to see what barrel lengths people were using for the 6.5 Creedmoor cartridge and get an idea for what kind of velocity he would be sacrificing, and saw a lot of debate … but not a lot of helpful information. Both of the barrels were big, heavy, Krieger #10 contours with 1:8 twists (and both rifles could shoot 10 shot groups under 1/2″ … mostly in one ragged hole). He eventually rebarrelled to a 22″ barrel, which he loves. He was also planning to add a suppressor to his rifle, and a 26″ barrel + 9″ suppressor makes for a pretty long and cumbersome rifle. He started with a 26″ barrel, because that is what Surgeon typically used but lately we’ve been shooting in more practical/tactical long-range competitions where you have to carry the rifle for miles every day … so he wanted to lighten the load. The calculator does not take into account other external factors such as wind which may effect range and accuracy.One of my closest friends has two 6.5 Creedmoor rifles made by Surgeon Rifles that he has tried a couple different barrel sizes on.
The calculator "Range" results are based on shooting an Airsoft Gun with a minimum barrel length of 300mm in a level possition at 3 feet above the ground, the resulting "Range" calculation indicates the end of travel where the BB contacts the ground. (Other internal components may effect performance but it will give you a good starting point) For example entering 400 in the "Speed(FPS)" box under "Input 1" and clicking "Calculate" will give you a result of 121.6 in the "Velocity(m/s) Results 1", as most Airsoft spring rate designations are based on Meters Per Second (M) we can now round the result and determine in order to achieve 400FPS we would need an M120 spring. The "Velocity (m/s)" results can also be used for determining which spring to select for a desired FPS. Click calculate, this will show you under Results 2 the aproximate Muzzle Velocity in FPS and Meters Per Second and Range in Feet and Meters for your Airsoft Gun. This will show you under "Results 1" the corosponding velocity in meters per second and energy in joules.Įnter the Energy (Joule) results from the FPS and Velocity calculator in the "Input 2" field along with your BB weight in grams.
#Muzzle velocity calculator how to#
How to use the FPS and Velocity CalculatorĮnter your desired BB weight and Speed under "Input 1" and click calculate.
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