Hey everybody I have been playing with arrow weight and Foc after reading Dr. Ashby's report. i have a question for you guys who have experience. I am shooting a 59# longbow and I have easton legacy 2018 aluminum arrow which weigh 575gr with out a head. I took a peaice of rope and slid inside the shaft and got a 870gr arrow without head. I was thinking of putting a 190gr head on the arrow and ending up with a 1060gr arrow (if my math is right)
So the question is, is this too much overall weight and if so should I try to find a lighter insert to fill the arrow to beef up mass.
My other question is with FoC should I try to get all my added weight up front with a product like the weighted inserts with adjustable weights?
I undersatnd that anything greater than 20% FoC helps a lot with penetration. I also undersatnd that losing arrow speed by increasing mass can also help penetration.
Any suggestions would be great, thanks guys
Allan
That shaft weight seems too high to me, but I'm not looking at the charts. You need bunches of weight on the front of a 2018 to get what is considered "extremely high" FOC. I would guess around 350-400 grains. This is usually easier to achieve with carbons that are too stiff with normal weight points. Some CE Heritage 150s or 250s would be easier.
Arrow flight is by far the most important thing for penetration(and accuracy), all the weight in the world isn't going to give you its full benefit if the arrow isn't flying well. Adding rope to the inside of the shaft will reduce the dynamic spine, adding a huge amount of point weight will also do the same thing. I would work on getting an arrow the flies perfectly and not worry about adding a lot of mass or point weight.
allan I think your math is off. To get that weight without a head you would have like a 45" arrow. 2018 weigh like 12.3 grains per inch. Depends on your draw length if you can really get high FOC with a alumnium.
The arrow I I'm going to try out this fall for elk is a CE Heirtage 350 30.5" with 300 grains up front. Right at 20% FOC.
Yes, your math is off. I have some 2018 legacy that are 28.5 inches long and they weigh 520 grn with a 125 field point.