- Ball Stack - the balls "stacked" above the breech waiting to be fed.
- Barrel Break - when the ball breaks in the barrel - there will be fill and or shell in the barrel - the breech will be clean
- "True" or "Pure" Barrel Break - when a ball is loaded w/o damage then breaks in the barrel (this may not exist)
- Blow Back Marker - A paintball marker where a fraction of the gas that is released from its main valve system during the firing phase is used to re-cock the marker.
- Blow Back in a Marker - Blow Back is the term given to any gas that is released from in or around the breech-loading/bolt mechanism of the marker during the firing phase. In most current designs this gas is normally expelled through the feed tube of the marker and can cause any waiting paintballs located in the feed tube to be displaced away from the breech area. This, in it's most sever form can cause the balls in the ball stack to "jump" back up the feedneck.
- Blow Forward Marker: A paintball marker that uses the same gases that are stored in its primary firing chamber to propel the bolt mechanism forward during the chambering phase of the firing sequence.
- blowtest - using 5-10 paintballs from a case and testing each on until you find a barrel that the paintball stick gently in the barrel and only require a slight puff of your lungs to push them out.
- Bolt Clip - when the bolt interacts with the second ball in the ball stack
- Bolt Nick - when the bolt interacts with and damages the second ball in the ball stack - this can have varying levels from slight crack to fully removing the bottom of the second ball
- Bolt Strike - The act by which a paintball at rest in the breech is struck by the face of the bolt as it drives forward to chamber the paintball into the barrel prior to firing. The act of the bolt striking the stationary paintball may cause a fracture in the paintball, which may lead to total failure during firing.
- Breech - The area inside a marker where a paintball comes to rest after the loading operation, prior to being introduced to the barrel.
- Chop - when the ball breaks in the breech of the gun - there will be fill and or shell in the breech, feed neck and barrel
- Dump Chamber (or Firing Chamber) - The internal volume of a paintball marker that is used to store the volume of gas used to fire the next paintball. The Dump Chamber can be configured to either be open to the gas supply, or isolated from the gas supply during any or all parts of the firing cycle. A fixed volume dump chamber controls the volume of air released during the cycling process - while a non-sealing dumb chamber must control the volume of gas released by controlling the time that the valve mechanism is open.
- Loading Fracture - when the loading system of hopper, bolt etc. causes damage to the ball while it's being moved into firing position. This damage may or may not cause failure of the ball before it leaves the barrel. This may include, but is not limited to, factors such as Bolt Clip, Bolt nick etc
- matched paint to barrel - paint chosen using the blowtest - this is often considered to be using the paint that is the same diameter as the inner diameter of the barrel.
- overboring - using a barrel that has a larger inner diameter then the paintball being fired from it
- underboring - using a barrel that has a smaller inner diameter then the paintball being fired though it
- Spin - types: Top Spin, Back Spin, Side Spin (Left), Side Spin (Right), Twist (Clockwise), Twist (Counter-clockwise)
- SD or Standard Deviation - is a measure of the variability or dispersion of a population of a data set. In PunkWorks this is normally applied to velocity or accuracy. Lower numbers mean more consistent or accurate.
- Vector - the hypotenuse of the Standard Deviations of the x and y axis on an accuracy test. This can be thought of as a radius of a circle - the area of which is one Standard Deviation. A simple tool to compare overall accuracy during testing.
Terms in need of definition
- Slip Stream
- Confidence interval
Please post up with more term suggestions - we'll move them to this first post once we agree on the meaning.
Edited by brycelarson, 08 March 2010 - 09:37 AM.