What does GPI mean for arrows?
grains per inch
The industry standard measurement for weight is grains per inch (GPI). (One grain = 1/7000 of one pound). There are many factors that make up GPI including: arrow diameter, wall thickness, and shaft material. The GPI weight of listed arrows does not include the weight of the point, nock, insert or fletchings.
What is a good GPI for arrows?
Around 8 GPI shafts is what I am generally drawn too. For safety sakes the recommendation is 5 grain per pound but the spine of the arrow is more important.
What does GPI mean on crossbow bolts?
GPI = Grains Per Inch. More grains means the arrow weighs more.
What grain field point should I use?
At 3D and field events, field points weighing 100 to 120 grains are common. Anderson said most top archers use arrows with a moderate FOC. “If a lower front-of-center shoots and groups better for me, that’s what I’m going to go with,” he said.
How many pounds does an arrow weigh?
A light arrow has a finished GPP of 5 to 6.5 grains for each pound of draw weight. A midweight arrow weighs between 6.5 and 8 grains. Heavy arrows weigh over 8 grains. This information can be important when shooting a recurve, barebow or compound.
How heavy should my arrow be for elk?
It is my opinion that arrow speed is valuable only when you are shooting a shaft with adequate weight for the game you are after. For elk, I recommend a finished arrow weight of 420 grains as a minimum for hunters drawing 60-70 pounds.
How is arrow GPI calculated?
GPI is often confused with GPP – grains per pound – but these calculations differ greatly. GPP is the arrow’s total weight divided by the bow’s poundage for shooting that arrow. A light arrow has a finished GPP of 5 to 6.5 grains for each pound of draw weight. A midweight arrow weighs between 6.5 and 8 grains.
How much should my arrows weigh?
For reference, light arrows weigh about 350 grains, a typical arrow weighs 420 to 500 grains, and a heavy arrow weighs over 600 grains. Bentcik said few Americans use arrows weighing 700 grains or more unless they’re shooting traditional equipment.