How do you calculate arrow spine weight?
Static spine is how much an arrow reacts when a 1.94 lb. weight is hung from the center of the arrow. To calculate this, arrows must be 29” long and supported at two points 28” apart. The number of inches the arrow bends multiplied by 1,000 is the arrow’s spine.
How heavy should my arrow be for my bow?
I think a good average hunting arrow should fall in the 6 to 8 grains per pound of bow weight, with lighter bows maybe even closer to 9 to 10 grains per pound. A typical 60-lb. bow should be in the 360- to 480-grain range, a 70-lb. bow in the 420- to 560-grain range.
How many grains is a 400 spine arrow?
400’s will be fine with 100 grain or 125 grain heads…if you want a heavier arrow than use some point weights and go to a 340 spine.
How many grains is a 500 spine arrow?
Arrows with weaker spines generally weigh less than those with stiffer spines. The Gold Tip Hunter XT in a 500 spine, for example, weighs 7.3 grains per inch, while the same arrow model in a 300 spine weighs 9.3 grains per inch.
Is a 500 grain arrow heavy?
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.
How heavy should an arrow be?
How heavy is a 400 spine arrow?
40-60 lbs.
The numbers refer to the spine of the arrow. The different spines refer to the stiffness, a 400 spine arrow is generally for bows 40-60 lbs. 350 spine is for bows roughly 55 – 75 lbs, and a 500 spine arrow is for bows roughly 30 – 50 lbs.
How much does a 400 spine arrow weight?
Generally 600 arrows are for bows from 15–35 pounds in draw weight, 500 for 35–55 pounds, 400 for 55–75 pounds, and 340 for 75–95 pounds. When you release the bowstring and the arrow moves forward it bends and then straightens out. If it bends too much it’s weak/soft. If it does not bend enough it’s too hard/stiff.
How much does a 340 spine arrow weigh?
Generally 600 arrows are for bows from 15–35 pounds in draw weight, 500 for 35–55 pounds, 400 for 55–75 pounds, and 340 for 75–95 pounds. When you release the bowstring and the arrow moves forward it bends and then straightens out.
Is 400 grain arrow for deer?
400 grain arrows running 305ish fps (which is probably a bit faster than your set-up) have worked fine for me on deer. Blows right through them if placement is good. I haven’t shot elk with that set-up but wouldn’t be worried about it.