Too much spine possible?
#3
RE: Too much spine possible?
Scott, you have it right on the money. Arrows heavier that recommended on the arrow charts can be tuned to perfection. The positive: increased kinetic energy. The negative: slower arrow speed. Problems begin when shooters start to drop well below the recommended arrow spine. Tuning problems, string and cable failures and the big one, limb cracking or failure are all inherent traits of under spined arrows.
#5
RE: Too much spine possible?
Is there a downside to having too much spine besisdes the arrow may be heavier?
But to answer your question, yes there is a down side to being overspined. What you want is the correct spined (not over or under). What you want is the arrow which shoots through the centershot of a perfectly tuned bow.
#6
Typical Buck
Thread Starter
Join Date: Jun 2005
Posts: 604
RE: Too much spine possible?
I have heard that too much spine can be a bad thing. I am curious if you or anyone else knows what happens during the firing of the arrow that throws things off. I am not questioning whether you are right or not, just trying to understand why it does it.
#7
Join Date: Feb 2003
Location:
Posts: 162
RE: Too much spine possible?
If shooting a release (where the significant side to side movement caused by an imperfet finger release is eliminated) what downside is there to being overspined? True, its hard to paper tune accurately, but what practical detriment is there? It seems even with broadheads, there would be litle downside. I have read that even with a release there is still notable up and down flexing and thus perhaps the weaker spined arrow will absorb it and revert to true center sooner, but isn't it harder to get that stiffer arrow oscilating to begin with? Also, is the stiffer arrow going to mean better penetration becaue less energy is expended oscilating? I'm far from an expert in all the nuances of archery. However, noone has provided an explanation that clicks (may be I'm simply to thickheaded to understand). Does the equation change if a drop away rest is used and there is no arrow contact to be worked upon by some up and down oscilation? I've experienced first hand the detriment of weak spined arrows with fixed broadheads--the eratic arrow flight is quite apparent. I've simply not experienced any downside with overspined arrows. Please share your expertise, experience or wild ass speculation!
#8
RE: Too much spine possible?
Honestly I feel that the overspine is not an argument that has any definite answer. You will have to see what works on your setup.
I personally shoot a GoldTip Pro 22 series (spine of .300) cut at 28" with a 85 grain tip, which is way overspined according to everyones charts. I have no problems with tears, and it bareshaft tunes well. I have a friend with a 65lb Mathews Outback, he is shooting 27" X-Cutters (.250 spine) with 65 grain points and his bow shoots bullet holes and bare shaft tunes excellent as well. We both shoot these arrows and setups because they are wide diameter arrows and catch a few extra lines for us in competitive 3D, and because they are both very close to the 5 grain per lb IBO minimums.
On the other hand, I hear of people claiming to have bad tears due to overspined arrows all the time on different forums. I really think it is all in how well the bow is tuned, and who knows what else. I have never specifically seen issues myself though with my equipment with overspine.
I personally shoot a GoldTip Pro 22 series (spine of .300) cut at 28" with a 85 grain tip, which is way overspined according to everyones charts. I have no problems with tears, and it bareshaft tunes well. I have a friend with a 65lb Mathews Outback, he is shooting 27" X-Cutters (.250 spine) with 65 grain points and his bow shoots bullet holes and bare shaft tunes excellent as well. We both shoot these arrows and setups because they are wide diameter arrows and catch a few extra lines for us in competitive 3D, and because they are both very close to the 5 grain per lb IBO minimums.
On the other hand, I hear of people claiming to have bad tears due to overspined arrows all the time on different forums. I really think it is all in how well the bow is tuned, and who knows what else. I have never specifically seen issues myself though with my equipment with overspine.
#9
RE: Too much spine possible?
If shooting a release (where the significant side to side movement caused by an imperfet finger release is eliminated) what downside is there to being overspined
True, its hard to paper tune accurately, but what practical detriment is there?
#10
RE: Too much spine possible?
ORIGINAL: BobCo19-65
An over spined arrowcan tuned to a bow, however, if the tune is not at or close to centershot, an new arrow size is needed.
An over spined arrowcan tuned to a bow, however, if the tune is not at or close to centershot, an new arrow size is needed.
I feel overspine tuning problems are mostly magnified by a improperly tuned bow, or magnified by bad form.