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Question on Arrow Spine?

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Question on Arrow Spine?

Old 10-02-2012, 10:37 AM
Typical Buck
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Default Question on Arrow Spine?

My Gran daughter is shooting a Martin single came bow at 50 peak at 27" draw,she using a 8.4 grain easton shaft with 2" blazer vanes.
I was over at the easton chart say at that set up she should be shooting a 500 at 7.1 grains.
I also see on the chart the 400 shaft is a cross over at 51 lbs mark .
I wonder is she should stay with the 8.4 grain at 28" or switch to the lighter 7.1 for a little more speed for deer hunting
will the 500 shaft be a little under-spine
yep she shoot a release
400 shaft fly 20 yard bare shaft like a dime :I wonder how the 500 will work>
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Old 10-02-2012, 02:14 PM
Join Date: Jun 2012
Location: Bellows Falls,VT
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is she shooting the ACC pro. if so its a 440 spine and should be pretty right on for spine. If her true draw is 27 inches her arrows could be cut a inch or 2 shorter than 28 if you are that worried about speed. Here in New England I wont have many shots over 40 yards so speed isn't a huge issue for me. my draw is 30 inches but my arrows are 29 inches. I have a drop away rest and the end of my arrow ( with out point or broadhead) is about an inch in front of my rest. that is a good way to get the shortest and safest arrow for your set up. Hope this hepls!!
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Old 10-02-2012, 05:00 PM
Boone & Crockett
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Is the bow peaked out at 50# or is she shooting something less. I have a Martin Monster Buckhunter 35-50# and have it set up for my daughter-in-law at 35#. She is shooting 28" Gold Tip 35-55 arrows with excellent flight. (I shot these arrows with the bow peaked at 50# also with great flight.)
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Old 10-02-2012, 05:09 PM
Nontypical Buck
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yer not really gonna gain that many fps..if 5fps. i agree, maybe cut em down a lil if ya HAVE to. if yer bull'in every shot inside 35 yards, she'll be ok.
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Old 10-07-2012, 02:57 PM
Join Date: Sep 2012
Location: Keyser, WV
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The heavier shaft will carry more energy. Speed isn't always best. If it shoots good stick with it.

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Old 10-16-2012, 05:58 AM
Fork Horn
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Location: Southern New Hampshire
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More than likely she will not be making a shot at a deer more than 30 yrds out and more like 25 yrds and under. Shot placement is far more important than gaining a little speed at that distance. If she's shooting good with the set-up she is using now I would stick with it. Experiment with other options after the season is over....she'll kill a deer with it the way it is now, just keep her practicing every chance she gets.
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Old 10-17-2012, 04:05 PM
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If you have good flying arrows stick with them , allways better to have the stiffer spine when close to the limits , her arrows are already pretty lite , with low poundage and short draw a slightly heaver arrow is a benefit for hunting , it transfers energy better , a fixed deadly sharp 2 blade head is a suggestion also , and limmit shots to as close as possible
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