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Over Spined?

811 Views 13 Replies 11 Participants Last post by  jbm5095
Draw length is 29", pulling back 70lbs, arrow length is 28.5"s, total arrow weight is 448-450 grains.

Arrow spine is 300.

Based on what I'm reading I should have been places at 340 ... no?
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· Shootin and Cussin
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No. You will be fine. Just for the record, what is the weight of the broadheads are you using?
 

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Draw length is 29", pulling back 70lbs, arrow length is 28.5"s, total arrow weight is 448-450 grains.

Arrow spine is 300.

Based on what I'm reading I should have been places at 340 ... no?
The other question would be what bow are you shooting? Big difference between the needs of a Bowtech Solution SS in those specs and a PSE Omen. A more aggressive, speed bow will need a stiffer spine than a super smooth drawing, slower, bow.
 
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Agree with most here.You should be Ok. I shoot .300 spine sometimes with a 60lb bow. But I use heavier inserts and broadheads. Im of the mind its hard to be overspined if the bow is tuned well.
But like veritas said. What bow are you shooting?
 

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Depends on the bow. My SR6 (aggressive cams) is at 62 pounds and 29" draw and I'm shooting a 27" 300 spine with a 125 grain head and 23 grain insert. It tunes better than a 350 spine for me.
 
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Discussion Starter · #11 ·
That’s my exact arrow at same draw weight and shoots like a laser.
Only thing that made me question the spine was my broadheads are flying left of my fp at 40yrds and greater. I'm gna shim the top cam right tomorrow as I already tried moving the rest which cleared up 20-30yrd bh to fp groupings.

Thanks for all the responses everyone, sounds like my arrow is fine.

Shooting an RX7 U, slow smooth 70lber lol.
 

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Draw length is 29", pulling back 70lbs, arrow length is 28.5"s, total arrow weight is 448-450 grains.

Arrow spine is 300.

Based on what I'm reading I should have been places at 340 ... no?
Use this calculator before your arrow build: Target & Hunting Arrow Selector - Easton Archery
I like to lean towards the stiffer of the options. you can always add point weight.
 

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Depends on the bow. My SR6 (aggressive cams) is at 62 pounds and 29" draw and I'm shooting a 27" 300 spine with a 125 grain head and 23 grain insert. It tunes better than a 350 spine for me.
My SR350 @ 28” of DL/ 61# likes a 300 spine with 150 up front cut 26” C to C better than a 350 with same specs.

My Solution SS @70 # likes the same 300 with 197 up front.

I believe you’re correct, depends on cam.

Shoot what your bow likes/wants.
 
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