This is probably more suited for the Technical section, but then again, all of us bowhunters need/should be broadhead tuning our bows. Now, I understand the concept, and the basics behind how to broadhead tuning, but I'm running into an odd issue this year that I was wondering if anyone could shed some light on it for me.
To fully understand the oddness of this situation, I need to rewind back to when I started tuning my bow. As many of you know, I made the switch to left handed, and in the process of buying accessories, I decided I wanted to keep my CJ Dead Nuts Comp from my RH bow, and simply flip it for the time being. When I began tuning the bow, everything seemed to be going pretty well. However, when I was walkback tuning, I noticed that once I had my arrows from 10-40 yds spraying perfectly vertical, I needed to max out my windage to get the groups to hit there mark (first thing that struck me as odd). However, my arrows were hitting dead on (FP's), and I began practicing all spring and summer.
I decided to put the broadheads on the other day, and begin broadhead tunning. Initially, my broadheads were hitting about 3-4" to the left of my field points (but they were grouping very tight). According to Easton, this is the sign of a weak spine. I haven't tried dropping the poundage, and I shouldn't need to decrease the tip weight (I'm shooting 100gr field points, and 100gr Slick Tricks on 28" ACC 3-49s (365gr), 2" blazers, 28.5" DL @60-61lbs)). So, I began to move the rest to the right, and quickly found that I ran out of adjustment in the rest (using a limbdriver), and as such, my BH and FPs are grouping well, but the BH's are still hitting about 1-2" to the left of my field points.
Would you think this is a tuning issue? If so, is that the reason why my windage needed maxed out during walkback tuning? Could this problem be attributed to the RH sight being used on a LH bow (I'm not sure how that could be the case, but I may be missing something). I'm sure I could get my BH's hitting my aim point be adjusting my windage, but I feel that's simply a band-aid fix as I was always under the impression you should be able to get FPs and BHs to hit in the same spot (or close to the same) assuming you have a properly tuned bow/arrow setup. Thoughts?
This is probably more suited for the Technical section, but then again, all of us bowhunters need/should be broadhead tuning our bows. Now, I understand the concept, and the basics behind how to broadhead tuning, but I'm running into an odd issue this year that I was wondering if anyone could shed some light on it for me.
To fully understand the oddness of this situation, I need to rewind back to when I started tuning my bow. As many of you know, I made the switch to left handed, and in the process of buying accessories, I decided I wanted to keep my CJ Dead Nuts Comp from my RH bow, and simply flip it for the time being. When I began tuning the bow, everything seemed to be going pretty well. However, when I was walkback tuning, I noticed that once I had my arrows from 10-40 yds spraying perfectly vertical, I needed to max out my windage to get the groups to hit there mark (first thing that struck me as odd). However, my arrows were hitting dead on (FP's), and I began practicing all spring and summer.
I decided to put the broadheads on the other day, and begin broadhead tunning. Initially, my broadheads were hitting about 3-4" to the left of my field points (but they were grouping very tight). According to Easton, this is the sign of a weak spine. I haven't tried dropping the poundage, and I shouldn't need to decrease the tip weight (I'm shooting 100gr field points, and 100gr Slick Tricks on 28" ACC 3-49s (365gr), 2" blazers, 28.5" DL @60-61lbs)). So, I began to move the rest to the right, and quickly found that I ran out of adjustment in the rest (using a limbdriver), and as such, my BH and FPs are grouping well, but the BH's are still hitting about 1-2" to the left of my field points.
Would you think this is a tuning issue? If so, is that the reason why my windage needed maxed out during walkback tuning? Could this problem be attributed to the RH sight being used on a LH bow (I'm not sure how that could be the case, but I may be missing something). I'm sure I could get my BH's hitting my aim point be adjusting my windage, but I feel that's simply a band-aid fix as I was always under the impression you should be able to get FPs and BHs to hit in the same spot (or close to the same) assuming you have a properly tuned bow/arrow setup. Thoughts?
Drop the poundage to about 55, or lower maybe 52 or so,and see what happens. Easy to do and that will give you a very clear indication of whether you have a weak spine or not. If it is a weak spine you could also try shortening the arrows. Have you done any bareshaft tuning?
__________________
Nature does nothing uselessly.
- Aristotle -
Well,let me try and explain what happened to me and it might somehow work for you as well.
I setup a new rest and did a quick tune on paper and found that my broadheads were hitting very close at 20 and 30 but the bow was not completely tuned,atleast not to my standards.So I started messing with a few things and trying different settings to see what would work best for me.I started checking my broadheads again and they were hitting left so I started moving my rest in and it wasn't helping.Didn't worry too much about it at first and then started asking myself why.SO,I went straight back to my tried and trusted GROUP tuning and when I found my sweet spot with field points,it just so happened that it was real close to where I had initially set it up.Here is the part that is interesting,the adjustment was OPPOSITE as one would normally make to get the broadheads hitting with fieldpoints.I actually had to move the rest out to move the broadheads in.My only thought is that they were kicking and the head was taking over midflight.
Now my broadheads are flying true with fieldpoints,good tear in paper and a great group tune.This tells me I am real close with center shot which is measuring just about 13/16 off the inside of the riser to center of the arrow and puts my arrow just outside of the end of the stabilizer if you are looking down at it from the top of the bow.
So basically what I am trying to say is just try and go the opposit way to see what happens to the broadheads impact.[8D]It sounds like you are not centershot to me.
This is probably more suited for the Technical section, but then again, all of us bowhunters need/should be broadhead tuning our bows. Now, I understand the concept, and the basics behind how to broadhead tuning, but I'm running into an odd issue this year that I was wondering if anyone could shed some light on it for me.
To fully understand the oddness of this situation, I need to rewind back to when I started tuning my bow. As many of you know, I made the switch to left handed, and in the process of buying accessories, I decided I wanted to keep my CJ Dead Nuts Comp from my RH bow, and simply flip it for the time being. When I began tuning the bow, everything seemed to be going pretty well. However, when I was walkback tuning, I noticed that once I had my arrows from 10-40 yds spraying perfectly vertical, I needed to max out my windage to get the groups to hit there mark (first thing that struck me as odd). However, my arrows were hitting dead on (FP's), and I began practicing all spring and summer.
I decided to put the broadheads on the other day, and begin broadhead tunning. Initially, my broadheads were hitting about 3-4" to the left of my field points (but they were grouping very tight). According to Easton, this is the sign of a weak spine. I haven't tried dropping the poundage, and I shouldn't need to decrease the tip weight (I'm shooting 100gr field points, and 100gr Slick Tricks on 28" ACC 3-49s (365gr), 2" blazers, 28.5" DL @60-61lbs)). So, I began to move the rest to the right, and quickly found that I ran out of adjustment in the rest (using a limbdriver), and as such, my BH and FPs are grouping well, but the BH's are still hitting about 1-2" to the left of my field points.
Would you think this is a tuning issue? If so, is that the reason why my windage needed maxed out during walkback tuning? Could this problem be attributed to the RH sight being used on a LH bow (I'm not sure how that could be the case, but I may be missing something). I'm sure I could get my BH's hitting my aim point be adjusting my windage, but I feel that's simply a band-aid fix as I was always under the impression you should be able to get FPs and BHs to hit in the same spot (or close to the same) assuming you have a properly tuned bow/arrow setup. Thoughts?
Drop the poundage to about 55, or lower maybe 52 or so,and see what happens. Easy to do and that will give you a very clear indication of whether you have a weak spine or not. If it is a weak spine you could also try shortening the arrows. Have you done any bareshaft tuning?
No I hadn't tried bareshaft, because this setup is almost identical to my previous bow setup (same arrows, just .5" longer, and my DL is .5" shorter), so I assumed spine was ok (as it was on my last setup). Rob can also attest to the fact that he's shot his 3-49s @ 28.5" DL from a range of 61 to 70lbs, and never had spine issues (granted his arrows are cut to 27"). I probably should have bareshafted. I have a few arrows sitting around that need refletched that would work.
Quote:
So basically what I am trying to say is just try and go the opposit way to see what happens to the broadheads impact.It sounds like you are not centershot to me.
Interesting. I thought of doing that, but I didn't. Are you saying I wasn't centershot before I adjusted anything for my BHs, or after adjusting my BHs, I wasn't at centershot? Isn't it safe to assume that if you are walk-back tuning and you get center-shot set with FPs, and then broadhead tune (again assuming you have to move the rest to do so), you are moving OUT of centershot?
I decided to put the broadheads on the other day, and begin broadhead tunning. Initially, my broadheads were hitting about 3-4" to the left of my field points (but they were grouping very tight). According to Easton, this is the sign of a weak spine. I haven't tried dropping the poundage, and I shouldn't need to decrease the tip weight (I'm shooting 100gr field points, and 100gr Slick Tricks on 28" ACC 3-49s (365gr), 2" blazers, 28.5" DL @60-61lbs)). So, I began to move the rest to the right, and quickly found that I ran out of adjustment in the rest (using a limbdriver), and as such, my BH and FPs are grouping well, but the BH's are still hitting about 1-2" to the left of my field points.
It seems to me that you found your issue Matt, but instead of taking an asprin for your headache you took a Tums.... if you know what I mean.
I shot 3-49s last year, at 61#s. The length was an inch longer than yours 29.5 arrow with a 29.5 draw... and with a 100gr head my spin was big time weak. I shoot a HCA Iron Mace with Trinary cams... basically very identical to the Binary cams on Bowtechs. Its a very hard cam system, and in my experience it shoots about 5# heavier than the charts say a single or hard cam will. This of course depends entirely on what bow you are shooting... half the folks on her shoot BTs... pardon my assumption.. but its an issue that I had myself with the same arrow.
As to your sight... are you shooting with both eyes open? Assuming you are, you are probably getting a little bit of cross eye dominence, especially if you have used your right eye as your shooting eye for most of your life, and that could be why you are running out of sight adjustment. I don't know all of your history shooting left vs right, but if you have switched, its not terribly suprising to me that your sights might seem WAY off center compared to your arrow. Everybody's eyes see things a little bit differently, my sights are 1/8" left of my arrow (I'm right handed) and just about every bow that I shoot of someone elses my arrows impact left. My right eye is my dominant eye, but I have 20/15 vison in my left eye and like 20/30 in my right. My eyes are very very good, but I do notice a bit of a difference, and I think thats where it comes from.
__________________ You get what you put in, and people get what they deserve. - Kid Rock
I decided to put the broadheads on the other day, and begin broadhead tunning. Initially, my broadheads were hitting about 3-4" to the left of my field points (but they were grouping very tight). According to Easton, this is the sign of a weak spine. I haven't tried dropping the poundage, and I shouldn't need to decrease the tip weight (I'm shooting 100gr field points, and 100gr Slick Tricks on 28" ACC 3-49s (365gr), 2" blazers, 28.5" DL @60-61lbs)). So, I began to move the rest to the right, and quickly found that I ran out of adjustment in the rest (using a limbdriver), and as such, my BH and FPs are grouping well, but the BH's are still hitting about 1-2" to the left of my field points.
It seems to me that you found your issue Matt, but instead of taking an asprin for your headache you took a Tums.... if you know what I mean.
I shot 3-49s last year, at 61#s. The length was an inch longer than yours 29.5 arrow with a 29.5 draw... and with a 100gr head my spin was big time weak. I shoot a HCA Iron Mace with Trinary cams... basically very identical to the Binary cams on Bowtechs. Its a very hard cam system, and in my experience it shoots about 5# heavier than the charts say a single or hard cam will. This of course depends entirely on what bow you are shooting... half the folks on her shoot BTs... pardon my assumption.. but its an issue that I had myself with the same arrow.
As to your sight... are you shooting with both eyes open? Assuming you are, you are probably getting a little bit of cross eye dominence, especially if you have used your right eye as your shooting eye for most of your life, and that could be why you are running out of sight adjustment. I don't know all of your history shooting left vs right, but if you have switched, its not terribly suprising to me that your sights might seem WAY off center compared to your arrow. Everybody's eyes see things a little bit differently, my sights are 1/8" left of my arrow (I'm right handed) and just about every bow that I shoot of someone elses my arrows impact left. My right eye is my dominant eye, but I have 20/15 vison in my left eye and like 20/30 in my right. My eyes are very very good, but I do notice a bit of a difference, and I think thats where it comes from.
I'm not shooting with both eyes open. Although I'm most relaxed when I do this, I honestly blur the pin so much that I can't even really see where it is.
So if my spine is weak at 28", I wonder if cutting them down to 27" and dropping a few pounds would help?
I would drop the poundage first and see if you can get it in like that. If it tunes that way then you could cut an inch off and just increase the poundage until it comes back in tune.
__________________
Nature does nothing uselessly.
- Aristotle -
I would drop the poundage first and see if you can get it in like that. If it tunes that way then you could cut an inch off and just increase the poundage until it comes back in tune.
Yeah, that would probably be the easiest. I'll give that a try tonight. Thanks.
Just a quick update. I was able to get them hitting basically right on the money. My last tweak resulted in a broadhead/field point group 2" at 30yds, so I think it's pretty much on. I had to crank down my poundage 2 full turns. The good news (well I suppose there's two components to this) is my BH's and field points are hitting in the same spot, AND my bow is more comfortable to draw/hold. The downside is I would guess I'm at about 58lbs or so draw weight, and my arrows are about 1" low at 20, and ~4" low at 30 (weird). I know I can adjust the elevation, but that seems to be quite a difference between my 20yd and 30yd change. I'm also not too thrilled to be shooting a 365gr arrow at 58lbs. With as much as they were off before, I don't even think cutting them down to 27" would work. This is so strange because according to Easton's chart, a 100gr tip on a 28" (+/- .5") in the 57-62lb range calls for a 3-49. Why did I need to make such a change?
Let's talk Broadhead Tuning.
My only thought is that they were kicking and the head was taking over midflight.
It sounds like you are not centershot to me.
