this has caught my interest and i didnt have anythig better to do at the time...Bulls vs Heat in a minute. so i gathered some info and jotted a few ideas down.
"When shooting both arrows out of the same bow, the lighter arrow will of course be faster
at point blank range. However, the heavier arrow will leave the bow with more kinetic
energy and momentum due to the bow being more efficient at delivering energy into the arrow."
"At typical archery distances, the lighter arrow will almost always maintain a higher speed
than the heavier arrow. Even though the lighter arrow is slowing down faster,
it started out much faster and the heavier arrow is also slowing down.
Because the heavier arrow is decelerating at a slower rate, it will maintain a higher
percentage of it’s original speed than the faster arrow.
Also remember that the heavier arrow has more kinetic energy and momentum than the lighter
arrow at launch already. This gap only grows larger as the arrows progress downrange."
above info taken from:
note that The above is when the arrows are fired out of the same bow....
if the arrows are matched to fired out of their respective mates for a bow....
and leave the bows at the same speed the lighter one drops more
because it loses its speed/momentum more rapidly.
at least this is what i have experienced...myself.
i plugged Numbers ito stu mac dynamic spine and came up with numbers
using the same brand bow, same drawlengths, just one at 30# one at 60#
the 30# bow needed a Redline 900 (good guess earlier i suppose)
@29" long witha 85grain tip +20grains for insert came out with
Total / G.P.P / F.O.C / FPS / K.E.
290gr / 9.7 / 15.4 % / 188 / 22.9
60# bow needed a 2216 @29" 175+20 tip and insert
TOtal / G.p.p / F.o.C / FPS / K.E.
560gr / 9.3 / 16% / 192 / 45.9
These arrows supposedly would mate and fly well out of their bows.
the final dynamic arrow and bow were within 2 of eachother
everything came out really good i was surprised by being able to get a simular FOC%. GPP FOC and FPS all simular
and the total grains and KE came out double basically.
Does the lighter arrow with roughly 50% the KE of the heavier one,
drop Twice as much at say 30 yards than the heavier one????
(does it double the arc of the arrow path, since everything has to be relative???)
if this is the case i would think that the heavier drawing bow
Assuming you can shoot it comfortable
is the better choice especially in a hunting situation. and a 3d situation if you can handle it