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Old 03-07-2009, 11:29 AM   #1
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Default How fast am i shooting?

hi guys... i purchased a new bowtech SWATa week ago, and i'm trying to figure out the speed roughly without a chronograph. heres the specs: i'm shooting at 70 lbs. my draw length is 31 in.and the total weight for the arrow in grains is 460. the ibo specs for the bow are 314-322 fps. i'm just wondering what kind of speed i'm shooting roughly.
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Old 03-07-2009, 02:49 PM   #2
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Default RE: How fast am i shooting?

i'd say between 280 and 285, but I'd say your arrows are a little underspined with the 125 grain heads.
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Old 03-07-2009, 03:25 PM   #3
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Default RE: How fast am i shooting?

I added 10 grains of weight on your string along with the Data you submitted and came up with 292 FPS

http://www.backcountrybowhunting.com/articles/tools.php
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Old 03-08-2009, 09:21 AM   #4
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Default RE: How fast am i shooting?

Quote:
ORIGINAL: JoshKeller

i'd say between 280 and 285, but I'd say your arrows are a little underspined with the 125 grain heads.

underspined? care to explain? i thought the guy at the bowshop set me up right with the 7595's.....
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09 Bowtech S.W.A.T.
31 in draw
GoldTip XT Hunters
125 Gr Muzzy 3 Blade Broadheads
Ripcord Drop Away
Extreme Archery Sight

Hunters aren't so different from other environmentalists; we just like to take home souveneirs.
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Old 03-08-2009, 10:17 AM   #5
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Default RE: How fast am i shooting?

I agree that your spine is going to be weak.That is the problem with Goldtips.They are rated up to 95#'s but no way in hell will that happen at long draw lengths such as yours.The 7595 is only a 340 spine and you clearly need a 300.


I am getting you right at 280 fps.
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Old 03-08-2009, 11:44 AM   #6
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Default RE: How fast am i shooting?

1 question. How long are your arrows? Even with the 125s, you almost have to be leaving them full length to get 460.
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Old 03-08-2009, 11:52 AM   #7
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Default RE: How fast am i shooting?


Quote:
ORIGINAL: Ben / PA

1 question.Â* How long are your arrows? Even with the 125s, you almost have to be leaving them full length to get 460.Â*

Not if they are camo,which that was what I assumed,so I could get that weight when I ran the numbers.
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Old 03-08-2009, 02:11 PM   #8
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Default RE: How fast am i shooting?

the arrows are cut right to 32 inches. what do you guys suggest i do to get the spine where it needs to be? i just bought a dozen arrows thinking thats what i needed.
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09 Bowtech S.W.A.T.
31 in draw
GoldTip XT Hunters
125 Gr Muzzy 3 Blade Broadheads
Ripcord Drop Away
Extreme Archery Sight

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Old 03-08-2009, 02:22 PM   #9
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Default RE: How fast am i shooting?

Most of us are shooting arrows shorter than our draw length buy about an 1".

You are well underspined.IMO,you will need to be shooting a 30" arrow that is a 300 spine to be close to correct at that poundage.
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Old 03-08-2009, 05:16 PM   #10
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Default RE: How fast am i shooting?

so is there anything i can do with the current arrows i have? turn down the poundage ect ect.?
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09 Bowtech S.W.A.T.
31 in draw
GoldTip XT Hunters
125 Gr Muzzy 3 Blade Broadheads
Ripcord Drop Away
Extreme Archery Sight

Hunters aren't so different from other environmentalists; we just like to take home souveneirs.
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