Ok, So I was shooting Easton Flatline 400 7.4 gpi S diameter, with a 100g montec. I switched it up and shot some Easton Hexx 400 7.2 gpi H diameter with the same braodhead. Im confused because the Hexx hit about 4 inches lower than the flatlines eventhough the hexx is a lighter arrow??
Interesting, considering kinetic energy, drag, and deceleration I would have expected the opposite. Maybe it has something to do with the spin and flex of the arrows in flight or possibly the fletching?
Don't have those 2 diameters available to me at the moment, hence the ? But that typically is the reason 2 shafts of different weights have major different impacts vertically at close distances. Sent from my SAMSUNG-SGH-I317 using Tapatalk 2
So if you are shooting a 340, 9.3 gpi arrow and you switch to a 400 10.2 gpi. What do u think will happen? I am moving from a cabela's x stalker to a Easton FMJ for hunting.
Depends on diameters of said arrows. Sometimes the diameter increases with the stiffer spine. In that case, the poi may be very close at closer distances. This is such a misunderstood part of archery that it is almost rediculous. The archery world has preached speed for so long that people think 5fps makes a freaking difference. You change arrows and you resight. What is so hard for people to understand about this. Then the only difference that matters from here is how much difference is there in poi between arrows on a 5 or so yard misjudged yardage. the difference on 50 fps is usually around a 1/4" PER YARD. Sent from my SAMSUNG-SGH-I317 using Tapatalk 2
but what i cant figure out is why would the lighter arrow with the smaller diameter H hit lower than the slightly heavier arrow with the lager S diameter. And does this mean that one aroow hits harder than the other?
Smaller diameter means it sits lower on the rest. It is basically pointed lower so it hits lower. The center of the shaft will be lower. Sent from my SAMSUNG-SGH-I317 using Tapatalk 2
Too many factors to consider to just assume a lighter arrow will hit higher. Honestly you're talking about 0.2 grains per inch difference. Thats only 5.8 grains over a 29" arrow. That's negligible. What's more than likely the case here is that the dynamic spine of the lighter, smaller arrow is different. The arrow flexes more, takes more time to recover to straight flight, loses speed in the process and hits lower. You need to chrono your arrows as far from the bow as you can without hitting the chrono obviously. See what speed they're at. I highly doubt the smaller, lighter arrow is going faster and hitting lower.
That's an interesting thought. Though I really wonder if 0.011" difference in position at the rest would account for 4 inches of drop on target. Then again, OP didn't say what range this is happening at....maybe at 40 or 50 yards that'd be a possibility.
Nock size can also play a role. If a nock is smaller, it will slide up farther and will cause the arrow to be pointed downhill. Resulting in a lower shot. This is why it's so important to retune everytime you change arrows. Sent from my SAMSUNG-SGH-I317 using Tapatalk 2
