Arrow spine advice for HEX7.5s

JohnK

Well-known member
Looking for some advice and experience with HEX7.5s and arrow spine, shooting off a rest and plunger (preferably target, but barebow info also useful.

My draw length (following coaching) is now 31 1/2in to the back of the bow, and I hope to be shooting in the 40 to 42lb range by next spring.

I'm interested to hear advice on arrow spine from archers with a similar draw length.

Thanks :)
 

Rik

Supporter
Supporter
I obviously can't help with that (given the disparity in draw length), but my current observation is that, especially if you go with the Border recommended BH, it may need a lot stiffer shafts than you expect.

I was happily shooting 750s with my old limbs at 43lbs (which admittedly charts on the weak side). I may need to go to 600s with hex 7s at 38lbs... I'm still experimenting.
 

JohnK

Well-known member
That's the result I'm hoping for...

I picked up 21 used ACE 430s recently, which with the one piece points and pin nocks will come to a shade over 31 1/in. If they're too stiff for 40-42, I won't be able to shoot them unless I step up further.
 

Darth Tom

Member
Again with a shorter draw length (36# @29.25"), but my spines are in line with the charts. I'm shooting 660 Carbon Ones at the moment, which I selected through group testing against spines from 800 to 500 having heard the Hexes can be a bit funny. For me the 660 and 600 both grouped well but the 660 were just a little better. Bare shaft didn't give a useful reaction on any of the spines but the groups told their story.

The Hexes seem to need a range of spines depending on the archer, so my advice would be to do this kind of group testing and go with what seemed to work.
 

JohnK

Well-known member
Well now, it seems it's likely I won't be far off with the 430s. That was a good purchase :)

Thanks all!
 

Rik

Supporter
Supporter
I've been playing a bit. I can get 670s to group, which are 1 or 2 spine groups stiff according to Easton's charts. But 620s will definitely not work. 670s will produce touching groups (if I don't screw up) but the 620s won't get within 4 inches of each other.
Seems to need a quite in-line button though.
 

Timid Toad

Moderator
Staff member
Supporter
Fonz Awardee
Ironman
I've usually found that with the choice of two spines, the weaker, combined with a super-stiff button works best.
 

O'Mahony

New member
Bit late to the dance......but I would be curious as to what arrow ended up tuning for you John? I am also a long draw archer (32.5") and shoot XL Hex 7.5's on a 25" riser. I was able to arrive at a good state of tune with a .400 spine Easton X7, 33" arrow with a 100 gr point. My favorite for this bow is a .320 spine X7 also cut to 33" with a 175 gr point. Anyways, loving my 7.5's! tim
 

Timid Toad

Moderator
Staff member
Supporter
Fonz Awardee
Ironman
Bit late to the dance......but I would be curious as to what arrow ended up tuning for you John? I am also a long draw archer (32.5") and shoot XL Hex 7.5's on a 25" riser. I was able to arrive at a good state of tune with a .400 spine Easton X7, 33" arrow with a 100 gr point. My favorite for this bow is a .320 spine X7 also cut to 33" with a 175 gr point. Anyways, loving my 7.5's! tim
Pounds on the fingers, TO'M?
 

O'Mahony

New member
I haven't scaled to find peak draw weight with my set up but limbs are marked 40#. I was a bit surprised on how stiff a shaft the bow tune wanted even though I've read that Hex's like stiff spine and center shot. I am not using a plunger but a springy rest and that likely has bearing.
 

JohnK

Well-known member
I picked up some ACE 430s, which are slightly shorter than I'd like (31 5/8in overall) but with 140gr points and pin nocks seem to be a good tune.

When/if I get some X10s, I'll probably go for 410 spine, but 1/2in to 3/4in longer.
 

O'Mahony

New member
Bit late to the dance......but I would be curious as to what arrow ended up tuning for you John? I am also a long draw archer (32.5") and shoot XL Hex 7.5's on a 25" riser. I was able to arrive at a good state of tune with a .400 spine Easton X7, 33" arrow with a 100 gr point. My favorite for this bow is a .320 spine X7 also cut to 33" with a 175 gr point. Anyways, loving my 7.5's! tim
I NEED TO APOLOGIZE

After reading Timid's and John's posts I had to check my arrows. It is .400 spine X-7's that have tuned for me with the 175gr points! It is .505 spine X-7's that I have tuned with 100gr points. The .320 spine arrows I have are for a different bow. All these black arrows look alike....smile.

Man, I must be getting old. Best tim
 

Esperos

Supporter
Supporter
Another HEX7.5H archer

Looking for some advice and experience with HEX7.5s and arrow spine, shooting off a rest and plunger (preferably target, but barebow info also useful.

My draw length (following coaching) is now 31 1/2in to the back of the bow, and I hope to be shooting in the 40 to 42lb range by next spring.

I'm interested to hear advice on arrow spine from archers with a similar draw length.


Thanks :)

Hi, What have you been finding ? Have you encountered any issues , ....anything at this stage ? I have a similar draw lenght to yours.
I am on 43/44lbs on my fingers and have gone through x10 shafts 450/410/380 and all are shooting level but nock end out to the right 20-30 degrees . checked for contact .. negative really puzzled what I am missing . If you have no usage testing feed back yet do come back to me when you do have a tune as I would be very interested to hear your results, On the other hand the Hex5H I have shoot brilliantly with out the extra speed out of the 7's .Good luck with your testing hope to hear from you.
 
Top