Total weight is self-explanatory, weigh the arrow once it’s ready to fire. Purchase a dozen arrows once you have found the right arrow.
20 INCH MISSION CROSSBOW BOLTS FREE
The arrow also must be long enough so the nock touches the string and the tip is free from interface at the other end of the rail. Besides dynamic spine, length affects total weight because arrows are measured in grains per inch (GPI), so the longer the arrow, the more grains are added. The majority of crossbow arrows are 16-24 inches long, with the average being 20. Longer arrow length also weakens dynamic spine. A heavier tip requires more force to start the arrow in motion, therefore the arrow will bend more to absorb the energy transfer before initiating movement, thus has weaker dynamic spine.
Dynamic spine is defined as how much the arrow oscillates back and forth when fired before it stabilizes in flight. The stiffer the arrow, the less it bends and the smaller the spine number like 200 stand for a 0.2 inch bend.ĭynamic spine is more complicated and is affected by tip weight, arrow length and draw weight. Material type, construction style and inside diameter all contribute to static spine. If it bends 0.5 of an inch, it will be labelled a ‘500’ spine arrow. Static spine is measured by supporting the arrow at both ends and hanging a 2 lbs weight from the middle and measuring. SpineĪrrow spine refers to the arrow’s degree of stiffness, as in how much the arrow resists bending. There are two types of spine: dynamic and static. Small game heads are advantageous when missing small game to keep your arrow from going astray. Common weights are 100gr, 125gr and 150gr. Tip weight affect two things: total arrow weight and dynamic spine. Rubber blunts are used for stump shooting (practicing) and small game hunting. Field tips are used for target practice. Broad heads, either a mechanical or fixed, are used for hunting and quick ethical kills. There are two decisions to make: style and weight. TipsĬhoosing a tip is relatively straight forward. Credit: Īrrow damage will occur if their is not contact with the string upon firing. Crossbow arrow nocks can also illuminate a small LED light when fired. When placing the arrow along the rail, you must ensure the string and arrow are in contact because nocks are designed to cradle the string and help transfer energy, not absorb a blunt impact from the string. Half-moon design helps to prevent the string from slipping off, which would result in a dry-fire. The half-moon has a groove that ensures the fletching’s are placed correctly along the rail and the arrow is correctly rotated in place. The types of nock shapes are: half-moon and flat. Nocks ensure a good connection between the arrow and the string from maximum energy transfer. NocksĬrossbow nocks are made from plastic or aluminum and are inserted into the back of the arrow shaft.
20 INCH MISSION CROSSBOW BOLTS MANUAL
For example, the Mission MXB crossbow series owner’s manual states the following: Regardless of crossbow manufacturer brand, reading their specification is the first step. Whichever application you are using, there five main factors for arrow selection: nock, tip, length, spine and total weight.
And then of course there are those, like me, who want both. On the other hand, target shooters will prefer the lightest arrow possible providing the flattest flight trajectory. Hunters want an arrow that provides deep penetration and acceptable KE, thus a heavier arrow is a likely candidate. Different uses and applications require different arrows. But what goes into selecting the right arrow?īuilding any arrow is a balance of speed, penetration and kinetic energy (KE). The wrong arrow means less than optimal performance, and worse, is dangerous. The right arrow means harnessing the most energy possible from the string ensuring proper flight right off the rail. Just like compound and traditional bows, crossbow arrow selection is critical to its performance. If your equipment is not reliable, calibrated and setup correctly for your shooting needs you are putting yourself at a disadvantages before the shot is taken. When the moment of truth arrives in the field after stalking into range of your quarry and are ready to squeeze the trigger, you want complete confidence in your equipment.
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