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Old 08-12-2010, 05:11 PM   #1
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Default 500's or 400's

Bow: bowtech destroyer 350
Arrow: Easton Epic N fused 400 or 500?
100 grain point
Poundage: 65
arrow length: 25"

I seem to be right in the middle or the two arrows (maybe a little toward the 500).
Should I just give up the extra 10 feet per second and go with the heaiver arrow? Or go with the 500? What are yall's thoughts?
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Old 08-12-2010, 06:09 PM   #2
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Originally Posted by jermelott View Post
Bow: bowtech destroyer 350
Arrow: Easton Epic N fused 400 or 500?
100 grain point
Poundage: 65
arrow length: 25"

I seem to be right in the middle or the two arrows (maybe a little toward the 500).
Should I just give up the extra 10 feet per second and go with the heaiver arrow? Or go with the 500? What are yall's thoughts?
One, the numbers are not wieght. Those are spine. You pick the spine of an arrow for a bow wieght/draw. You have to use spine to tune the bow properly.
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Old 08-12-2010, 06:16 PM   #3
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Your probably gonna need a 340.
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Old 08-12-2010, 06:43 PM   #4
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Your calculated draw weight at your specs and with that bow is about 73 pounds. You are going to need a 400 spined arrow with your set up if you are cutting them at 25 inches.

Easton or Beman 400
Gold Tip 55/75 or 400 depending on the model of arrow.
Carbon Express 45/65 or 250 depending on the model of arrow.

The numbers on the arrows do not necessarily correlate with the actual spine of the arrow. They never correlate with the weight of the arrow, though the weight-per-inch is usually printed on the arrow or box somewhere.
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Old 08-12-2010, 07:03 PM   #5
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Originally Posted by bigbulls View Post
Your calculated draw weight at your specs and with that bow is about 73 pounds. You are going to need a 400 spined arrow with your set up if you are cutting them at 25 inches.

Easton or Beman 400
Gold Tip 55/75
Carbon Express 45/65 or 250 depending on the model of arrow.

The numbers on the arrows do not necessarily correlate with the actual spine of the arrow. They never correlate with the weight of the arrow, though the weight-per-inch is usually printed on the arrow or box somewhere.
How are you coming up with the 73 pounds? Please explain. I do understand that the 400 and 500 is not weight, its spine. Just going by the chart on the arrow box, I would need 500, but its on the very end of that spine right before you get to the 400. By your calculations, I should go with the 400?
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Old 08-12-2010, 07:20 PM   #6
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How are you coming up with the 73 pounds? Please explain.
Shaft selector program. But if you don't have one you can go to Carbon Expresses web site and they have a basic calculator for you to use.

Basically it depends on the type of cams, real draw weight, draw length, arrow length, type of release, the bows IBO speed rating, let off, etc...

For instance, a bow like a Fred Bear charge with an IBO of 305fps isn't going to need as stiff an arrow spine as your Bowtech Destroyer 350 with an IBO of 350 fps. Even though they may both have exactly the same draw length, draw weight, arrow length, tip weight, etc...

The slower Fred Bear would use a 500 spine but the Destroyer 350 would need the stiffer 400 spine.
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Old 08-13-2010, 05:32 AM   #7
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The slower Fred Bear would use a 500 spine but the Destroyer 350 would need the stiffer 400 spine.
Thanks for your input! 400's it is!
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Old 08-13-2010, 05:45 AM   #8
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Thanks for your input! 400's it is!
Not so fast.....actually, you'd be better of with a .340, and keep about 26.5" of arrow. Want to make the arrow fly just a little better, put a 125gr tip on the front of it. Got with a .400, and you're gonna get weak spine reactions, unless you put a 75 gr or lighter tip out front.
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Old 08-13-2010, 06:05 AM   #9
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Not so fast.....actually, you'd be better of with a .340, and keep about 26.5" of arrow. Want to make the arrow fly just a little better, put a 125gr tip on the front of it. Got with a .400, and you're gonna get weak spine reactions, unless you put a 75 gr or lighter tip out front.
How are you coming up with the .340? I figured shooting a 25" arrow would make a 400 pretty stiff. With a 400 arrow and 100 grain tip, I would only be shooting around 275 fps. Im not questioning your knowledge, just wanting to learn how you come up with that. This is exactly why I put this thread on here, so I can get everyone's opinion.
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Old 08-13-2010, 06:15 AM   #10
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Originally Posted by jermelott View Post
How are you coming up with the .340? I figured shooting a 25" arrow would make a 400 pretty stiff. With a 400 arrow and 100 grain tip, I would only be shooting around 275 fps. Im not questioning your knowledge, just wanting to learn how you come up with that. This is exactly why I put this thread on here, so I can get everyone's opinion.
Look at it this way, it's more about the cam aggression. If you were shooting a Bear Instinct that has a soft cam, and is only IBO rated at 302fps, then a .400 might need to be 28" long with a 125 to balance out, but you're shooting a DESTROYER 350, which has a much more aggressive cam style, which requires a STIFFER shaft to tune best. With my 82nd at 63#, and with my 29" DL, I was still having weak spine reactions shooting a 29" .340 arrow with only 100gr up front. The D350 is just a touch more aggressive than the 82nd, but you're a couple pound heavier, and even with the 3" less DL, OT2 still plots you being better off with a .340 spine. You're always better off to be a little stiffer and a little longer than shorter or weaker.
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