Tuning help?

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This topic contains 12 replies, has 4 contributors, and was last updated by revwilder Revwilder 5 months, 1 week ago.

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  • March 12, 2014 at 9:06 pm #622565 Back to Top REPORT
    revwilder
    Revwilder

    Age: 45
    Joined: 2/3/2014
    Location: KY
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    Here’s my problem. I have been shooting for 25 years. I have always paper tuned and then the bow was very accurate. I have recently went from single cam to cam and 1/2 now back to 2010 Mathews Z7. I can paper tune and get a bullet hole but when I shoot bare shaft and fletched arrow from 15 yards the bare shaft hits three inches right with tail kicking left. I want both to hit together. Already have the left side of the yoke twisted. I am 28.5 draw @ 70lbs shooting Easton flatline 340 29″ long, 100gr point.

    Sent from Big Buck Country

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    March 13, 2014 at 7:35 pm #622642 Back to Top REPORT
    revwilder
    Revwilder

    Age: 45
    Joined: 2/3/2014
    Location: KY
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    No help at all

    Sent from Big Buck Country

    For Jesus!
    March 13, 2014 at 9:43 pm #622654 Back to Top REPORT
    vash
    vash

    Joined: 5/30/2010
    is that arrow a 340 spine?
    March 14, 2014 at 5:51 am #622668 Back to Top REPORT
    99fatboy
    99fatboy

    Age: 52
    Joined: 2/15/2010
    Location: n.y.
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    Do you get a bullet hole with both arrows, and is the integrity of the arrows both good, and do they have the same nock and is the tip weight the same for sure?
    black z7 magnum,tommy hogg,qad,b-stingers, vaportrail: blue smoke triumph,sword,hamskae,b-stingers:desert tactical chill R, tommy hogg,limbdriver pro v,ktech
    March 14, 2014 at 6:56 pm #622728 Back to Top REPORT
    revwilder
    Revwilder

    Age: 45
    Joined: 2/3/2014
    Location: KY
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    Do you get a bullet hole with both arrows, and is the integrity of the arrows both good, and do they have the same nock and is the tip weight the same for sure?

    Yes, 340 spine, both arrows in good condition, same point weight.

    Sent from Big Buck Country

    For Jesus!
    March 15, 2014 at 9:04 am #622775 Back to Top REPORT
    99fatboy
    99fatboy

    Age: 52
    Joined: 2/15/2010
    Location: n.y.
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    Contrary to your wishes, I don’t really see the need for concern about bare shaft impact point 15yds. away. This is why we fletch arrows, to help them keep their flight path. A bare shaft thru paper can eliminate the possibility of fletch contact ( if that is a question) and give a clean hole to read. other than that, I wouldn’t waste my time if your fletched arrows group well.
    black z7 magnum,tommy hogg,qad,b-stingers, vaportrail: blue smoke triumph,sword,hamskae,b-stingers:desert tactical chill R, tommy hogg,limbdriver pro v,ktech
    March 16, 2014 at 6:53 am #622805 Back to Top REPORT
    revwilder
    Revwilder

    Age: 45
    Joined: 2/3/2014
    Location: KY
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    I want the best flight possible.

    Sent from Big Buck Country

    For Jesus!
    March 16, 2014 at 7:45 am #622808 Back to Top REPORT
    99fatboy
    99fatboy

    Age: 52
    Joined: 2/15/2010
    Location: n.y.
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    I understand that but, the bottom line is, you really only need to be concerned, at that yardage, where the fletched arrows impact. Flight characteristics of an unfletched arrow at distance, is meaningless when trying to tune two completely different projectiles aerodynamically speaking. We are looking for an arrow that is stable in flight, an unfletched arrow is not. Maybe Brian( gjarcher) can give you some insight on this issue as well. He is very well schooled in flight of rockets, arrows and other projectiles, all relating to this issue. After all, why bother fletching at all, if they flew the same.
    black z7 magnum,tommy hogg,qad,b-stingers, vaportrail: blue smoke triumph,sword,hamskae,b-stingers:desert tactical chill R, tommy hogg,limbdriver pro v,ktech
    March 16, 2014 at 9:40 am #622813 Back to Top REPORT

    conquestador

    Age: 63
    Joined: 12/10/2009
    Location: Upstate NY
    I usually follow threads like this because I always learn something and I’ve been at the game for almost 50 years.  I think 99fatboy hit it right on the head and there is a certain amount of relativity that applies to every situation.  There was no mention of broadheads, so maybe you don’t hunt, but I’d like to draw a similarity.
    Everyone wants their broadheads to hit with their field tips.  Relative to the process,  some will say not to even bother with shooting through paper.  It’s a waste of time.   However,  many bows are out there that have rests installed that are nowhere close to being set up for centershot.   On one of my first centershots, I was getting a 9″ tear with field points.  The shop owner said to use mechanical broadheads to minimize bad flight.  Well, that was back in the good ole days and we’ve come a long way since then – thankfully.
    Each one of these “tests” helps get us to the final outcome – arrows that hit where we want them to while maintaining good flight characteristics.  If you were to graph the accuracy of POI with three different criteria you may find that there is no point where all three intersect.
    I too hope that Brian chimes in with his input.  Good luck and good shooting.
    March 16, 2014 at 10:19 am #622822 Back to Top REPORT
    99fatboy
    99fatboy

    Age: 52
    Joined: 2/15/2010
    Location: n.y.
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    After some more thought on this issue, I think the other thing to look for would be a draw length/form issue with the new bow. Depending on how the release of the arrow is related to draw length, long or short, and face contact because of the draw length, can create a point of impact shift, because then the fletched arrow is trying to correct the initial flaw in the release.
    black z7 magnum,tommy hogg,qad,b-stingers, vaportrail: blue smoke triumph,sword,hamskae,b-stingers:desert tactical chill R, tommy hogg,limbdriver pro v,ktech
    March 17, 2014 at 6:31 am #622912 Back to Top REPORT
    revwilder
    Revwilder

    Age: 45
    Joined: 2/3/2014
    Location: KY
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    After some more thought on this issue, I think the other thing to look for would be a draw length/form issue with the new bow. Depending on how the release of the arrow is related to draw length, long or short, and face contact because of the draw length, can create a point of impact shift, because then the fletched arrow is trying to correct the initial flaw in the release.

    I’ve thought about face contact. I’ve also been working with nuts & bolts over on the other site. He had me shorten my draw about a half an inch. I was having the problem before I shortened my draw. Its not as bad now. I was thinking of lengthening my d-loop seeing if that helps with bring bunched up on my face.

    I am going by the thought that fletched or bare shaft hit the same spot out of the bow at that short distance means you get optimal flight. The vanes work less giving better broad head flight, faster arrow because the vanes don’t correct sideways flight, all creating better penetration.

    Sent from Big Buck Country

    For Jesus!
    March 17, 2014 at 8:36 am #622945 Back to Top REPORT
    99fatboy
    99fatboy

    Age: 52
    Joined: 2/15/2010
    Location: n.y.
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    I agree with your philosophy. I guess the bottom line is, I think the bow itself is tuned properly and that it is outside forces causing the p.o.i. issue.
    black z7 magnum,tommy hogg,qad,b-stingers, vaportrail: blue smoke triumph,sword,hamskae,b-stingers:desert tactical chill R, tommy hogg,limbdriver pro v,ktech
    March 17, 2014 at 9:33 pm #623055 Back to Top REPORT
    revwilder
    Revwilder

    Age: 45
    Joined: 2/3/2014
    Location: KY
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    I agree with your philosophy. I guess the bottom line is, I think the bow itself is tuned properly and that it is outside forces causing the p.o.i. issue.

    {#emotions_dlg.mathews_thumbs_up} Gotcha! User error! I can probably agree, but I’ve not had this problem until the last couple of years. I’ve messed up a couple of deer hunts and I want to make sure it’s buck fever and not the bow out of tune.

    For Jesus!
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