What spine arrow would I need for a 40 lb bow?

What spine arrow would I need for a 40 lb bow?

I suppose it matters on how much weight you put on the end .

https://www.3riversarchery.com/dynamic-spine-arrow-calculator-from-3rivers- archery.html

600 w/ 125 point

I have shot the .600 traditional ones from a 43lb long bow with good success. 30" long 175g up front. And my draw length is 28.5" been using that same setup for years.

Black Widow 58" PCH-X, cocobola handle with zebrawood limbs, 41 @ 28 drawn to 29... full length Easton Axis Traditional 400s with 50 grain insert and tipped with 200 gr 1 1/4" ZPAs... weigh right at 590 grains and 150 fps according to my chrono.

600’s

Axis Trad 600's at 28.5 inches with 165 to 175 grains of total weight up front have worked well. Also can get ordinary everyday regular Axis (not the trads but the black shafts) in a 700 spine, and they are great with about 145 grains total up front.

JR, i sent you a pm

I shoot a 43 bound longbow. Axis Trad 600's at 29.5 inches with 165 grains

It all depends on where your bow is cut and what weight head you want to shoot. Center, Past center, proud of center. I have found that centershot plays huge into the equation.

And what kind of string you're using.

I'm shooting a DAS bow with endless loop string that came on it.

Play with three rivers spine calculator, 600 spine carbons should work fine.

600 spine and you'll probably have to build out your side plate some, I believe the DAS is cut 3/16" past center?

Average draw length,average bow, 600 will work just tune with point weight. >>>----> Ken

Do axis come in 600 spine

40# may be a little too light for Axis 600s.

Might be good if cut a lot past center. Not with long draw.

Most might want full length with some extra point weight.

Babbling Bob's 700 spine suggestion might help.

Ive learned a lot about lightweight bows and what i originally thought would be too stiff. Ive got one that tunes perfect w .500s, and another that does very well w 34" .600s and 30" .800s. your best bet is to buy several single shafts in diff spines then tune---IF you have developed solid form and are capable of shooting well enough to tune. No one can tell you what shaft you'll need--- only your bow can do that.

Axis Traditionals come in 600 -

http://www.lancasterarchery.com/easton-axis-traditional-arrow-shaft.html

Make sure that your carbon arrow isn’t below the minimum gpi rating for your bow. My long bow has a redline at 8 GPI which means that anything below that amounts to a dry fire. So you have to add weight either in the point or shoot weighted bushings in the shaft. Something to think about.

Make sure that your carbon arrow isn’t below the minimum gpi rating for your bow. My long bow has a redline at 8 GPI which means that anything below that amounts to a dry fire. So you have to add weight either in the point or shoot weighted bushings in the shaft. Something to think about.

Like 600 beman center shot nice small diameter that really penetrate

So will a 500 spine work?

"So will a 500 spine work? "

Without knowing your DL and the specifics of the bow, 'maybe.'

I shoot 500's from a cut-past-center recurve. I leave them full length and they seem to fly best with 145 up front. That's at a 28" draw +/-.

You might try a couple 1916's.

My bow is a DAS with 40 lb limbs. Not sure about how center shot it is. I draw 27 1/2. I did notice that an Easton chart I looked at last night did not have a 600 spine arrow anywhere on it. It recommended 500 spine so if that is the case I'm going to be shooting the same spine arrow as with my 52 lb so I expect to lose some performance.

Bows aren't rated on GPI, they may be rated on GPP. I wouldn't buy one that can't handle less than 8 GPP. Old Howard Hill shot arrows that were closer to 7 GPP. Great Googli Moogli.

But anyway, the DAS is cut past center I believe, so you have a relatively wide range you can use. 500 is likely leaning to the stiff side but nothing beats trying what you already have before buying something else.

“So will a 500 spine work?”

Depends how much feather you want to live with, but full-length 500s are too stiff to bare-shaft acceptably out of any of my bows, 3 of which are rated #55@28. Even with 2” aluminum insets and 150gr points. And I draw about an inch less than that, so figure a minimum 20% higher poundage than your #40.

600s have bare-shafted beautifully for me out of both the RER LB (#55@28”) and Howatt Bamboo Viper (#50) with shafts cut to 28”, 125 gr points and standard inserts.

That said, with some really big shields on the back, I can send the 500s way on down range and they drop right into the middle of the target as least as reliably as I can shoot them.

I would NOT want to hunt with them, though...

I'll try the 500 and then the 600 if that doesn't work

500 worked

What grain point did you end up having to use JR ?

Fwiw, due to the mysteries of carbon with stick and string it seems to me like some non-center 50-60# bows can be happy with 600 and with 500, so it may be worth a few wasted arrows to find sweet spot. Part of this has to do with shaft weight..which relates to thickness/toughness....

125. That's all I use. I make the arrow fit the point.

600's are going to be your best bet. They are narrower and will get close to center.. otherwise they would likely be too stiff.

BigJim

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