Arrow spine?

dmcbride · #1 08-27-2023, 03:34 PM

I’ve got a box of Blackout 340 spine arrows and am shooting a Bear Truth 2 at 60# with 28” draw. Will I be under spine using 250gr. Field points and broad heads? I know I am over spine with 125gr. Heads, just want to make sure it is safe with 250gr. Heads.

dmcbride · #2 08-30-2023, 04:29 PM

Not sure if I worded my question wrong or if nobody knows the answer to this. I’ve checked a few online arrow spine calculators and charts, but they don’t have any information about using this heavy of arrow points on a compound bow.

Anyone?

ab_hunter · #3 08-30-2023, 06:07 PM

If you are putting 250 grains up front, you will want to go to at least a 300 spine. A lot of the arrow manufacturer spine calculators don't account for this.

dmcbride · #4 08-30-2023, 06:46 PM

Quote:

Originally Posted by ab_hunter

If you are putting 250 grains up front, you will want to go to at least a 300 spine. A lot of the arrow manufacturer spine calculators don't account for this.

Thanks for the reply. Is there an arrow spine calculator that does account for heavy broadheads shot from a compound bow? Lots for recurves and long bows out there.

Rackmastr · #5 08-31-2023, 02:07 AM

Check out Archers Advantage or Pinwheel software Spine Selector. Either option (or others) will allow you to adjust a lot of variables to find good spine fit.

dmcbride · #6 08-31-2023, 10:57 AM

Quote:

Originally Posted by Rackmastr

Check out Archers Advantage or Pinwheel software Spine Selector. Either option (or others) will allow you to adjust a lot of variables to find good spine fit.

Thank you, with insert and broad head I need 250 spine arrows.

ab_hunter · #7 09-03-2023, 07:23 PM

You won't have penetration issues with that set up, good choice.

dmcbride · #8 09-04-2023, 10:01 AM

Quote:

Originally Posted by ab_hunter

You won't have penetration issues with that set up, good choice.

I have been shooting traditional archery for the last 8 years but my shoulder isn’t as good as it used to be, can’t hold at full draw very long. Figured I’d go back to compound and I have a ton of VPA broadheads, small game heads, field points, which is why I decided to get new arrows instead of new arrow points. I set up some new arrows this weekend, definitely hit hard and a lot more range then my long bow.