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Old 02-12-2019, 12:19 AM   #1
Wylde E
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Default Spine selection help

Is there anyone with arrow software that can help me pick the proper spine for an arrow build? If so let me know Iím trying to figure out if I need a 300 or 250 spine to start with. Thank you in advance...


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Old 02-12-2019, 12:09 PM   #2
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Ttt


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Old 02-12-2019, 01:53 PM   #3
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Is there anyone with arrow software that can help me pick the proper spine for an arrow build? If so let me know Iím trying to figure out if I need a 300 or 250 spine to start with. Thank you in advance...


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Bow/year
DL
DW

Arrow choice/brand
Point weight
nocks
vanes
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Old 02-12-2019, 03:10 PM   #4
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Originally Posted by Stoof View Post
Bow/year

DL

DW



Arrow choice/brand

Point weight

nocks

vanes


Helium maybe 2012?
29Ē
70lbs
Black eagle rampage and carnivore
225 point
10gr nick
3 blazer vane


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Old 02-12-2019, 03:47 PM   #5
muddyfuzzy
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Run the 250ís, itís a much better fit for you.


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Old 02-12-2019, 05:28 PM   #6
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Run the 250ís, itís a much better fit for you.


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Thatís what I kept going back to. I just wish there were some lighter arrow choices for a 250 spine to achieve high FOC. The 300 spine arrows have a lot of choices to achieve high FOC. So I will probably be going with the carnivores.


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Old 02-12-2019, 05:43 PM   #7
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I can run those numbers for you tomorrow. Left my laptop at the office.
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Old 02-12-2019, 06:04 PM   #8
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I can run those numbers for you tomorrow. Left my laptop at the office.
Thank you...
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Old 02-13-2019, 08:29 AM   #9
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Old 02-13-2019, 08:31 AM   #10
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Old 02-13-2019, 09:44 AM   #11
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Well cool I maybe able to run the rampage 300 at 28Ē if I have enough clearance. The carnivore 250s should be good though.
I am trying to make a 500-550gr arrow with >17% FOC for an elk arrow.


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Old 02-13-2019, 12:58 PM   #12
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Quote:
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I'm curious what the program predicts for speed on my similar setup?

Bowtech 101st airborne with upgraded Barnsdale limns
72# draw
29" DL
29" BE Carnivore 250
14 gr insert
75 gr brass weight
100 gr point

Knock 11gr
4 AAE Max fletch (37.8 gr total)
Bohning wrap 4 gr

Total arrow weight is 520-521
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Old 02-13-2019, 03:08 PM   #13
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Originally Posted by Bryan11 View Post
I'm curious what the program predicts for speed on my similar setup?

Bowtech 101st airborne with upgraded Barnsdale limns
72# draw
29" DL
29" BE Carnivore 250
14 gr insert
75 gr brass weight
100 gr point

Knock 11gr
4 AAE Max fletch (37.8 gr total)
Bohning wrap 4 gr

Total arrow weight is 520-521
I'm not at the office today so I can run that tomorrow if someone else doesn't get to it first. Not sure how to identify those limbs in this program but I will play with it.
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Old 02-13-2019, 11:14 PM   #14
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I'm not at the office today so I can run that tomorrow if someone else doesn't get to it first. Not sure how to identify those limbs in this program but I will play with it.
Thanks Stoof, I appreciate it
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Old 02-14-2019, 09:17 AM   #15
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Thanks Stoof, I appreciate it


Hereís what Iím getting. Couldnít figure out how to account for the different limbs so you could be a tad faster.
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Old 02-14-2019, 11:22 AM   #16
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Hereís what Iím getting. Couldnít figure out how to account for the different limbs so you could be a tad faster.
Thanks Stoof. I'm surprised it maintained that much speed but is a little on the stiff side. I might end up going to 125 gr point to see if it brings the stiffness down which would put me at 545 gr TAW. I plan on installing new strings soon and will test the speed to compare against program prediction.

I originally was shooting the Axis 340's with standard HIT insert and 100gr head with 3 fletch. But when i switched from shooting 60# to 72# i noticed i was really underspined. I may try to shorten the length on those arrows or get some 300's or 260's because i really liked how durable and accurate the Axis were.
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Old 02-14-2019, 12:57 PM   #17
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I bought a new Mathews Vertix and the bow shop convinced me to switch to Axis 400's from the Axis 340's I had on hand. Of course I've shot both at the range and I think the stiffer 340's shoot better. I notice some porpoising with the 400's. Setup is 57# draw, 28.5 draw length, 100 grain points. Thoughts?
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Old 02-14-2019, 06:18 PM   #18
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I bought a new Mathews Vertix and the bow shop convinced me to switch to Axis 400's from the Axis 340's I had on hand. Of course I've shot both at the range and I think the stiffer 340's shoot better. I notice some porpoising with the 400's. Setup is 57# draw, 28.5 draw length, 100 grain points. Thoughts?


The 340ís will show stiff. Thatís not always a bad thing.
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Old 02-14-2019, 08:12 PM   #19
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Default Spine selection help

Iíd like to hear from the dudes that know. Surprised they havenít chimed in more. I mostly use this program to get ballpark cut marks and play around from there. Iíve also never chronoed anything to see how the algorithm actually stacks up. Just learning as I go.
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Old 02-15-2019, 12:19 PM   #20
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Iíd like to hear from the dudes that know. Surprised they havenít chimed in more. I mostly use this program to get ballpark cut marks and play around from there. Iíve also never chronoed anything to see how the algorithm actually stacks up. Just learning as I go.
I put 125 gr points on today and shot them against two arrows with 100gr and no wrap, so the difference was 545 gr TAW vs 514 gr TAW. The grouping was a bit tighter with the heavier setup and roughly shot about 3" lower around the 40-50 yd mark.

I just ordered new strings this afternoon and will try to shoot through the chronograph once i get it setup and paper tuned. Pretty sure i'm tearing slight right as it sits just based on looking at the target but not worth messing with it until i replace strings.
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