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Discussion Starter #1
I'm currently running Flatline 340s at 65lb and 29" draw. The arrow charts say I could drop to a 400spine . Previous calculations showed my current in the ball park of 390gr total. If I drop to the 400 spine I will drop about 19-20 gr total weight.
The bow is shooting great. The boadheads fly great, same poi as my field tips. I may gain about 8fps if I drop spine.
Should I order 340 or 400?
 

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I would stay with the 340 spine. I think your overall tune will be better especially at longer yardages.
 

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I think you need to stick with the 340s. 390 grains is a good weight for whitetails and I don't think gaining 8 fps will even be noticeable for you or provide any advantage at all.
 

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I'm running the same specs on the synergy and I'm using the deep six fmjs in 330 spine, they fly really well
 

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Discussion Starter #5
Was out in the yard shooting 40 yards tonight. Best groups I have ever shot at 40!

So I called [email protected] Shore and ordered a dozen arrows exactly the same as I currently have.

Thanks for the input guys!
 
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