So i just add some info to this thread about my personal journey with Easton cheap arrows and their spine chart.
Recurve medium 68" limbs , riser. Limbs range from 24lbs to 40lbs at 28" draw.
I just want to warn that i was forced to throw away about 4/12 arrows from every batch of x12 Inspire arrows because they was so "wobbly" and curved. Coach dont alow to use those during practice at the club. We talking about 0.5mm - 1.5mm after beeing cut.
I know this and Inspire are dirtcheap arrows so this was expected.
Hopefully this will help some to be able to tune there bows a bit more accurate with Eastons cheaper type of arrows and dont have to second guess the result.
A sample picture how a read the Easton spinechart.
https://imgur.com/a/6UcQ1w8
link to the pdf:
https://eastonarchery.com/wp-content/uploads/2018/10/2018-Easton-TargetShaft-Selector.pdf
Easton Inspire 750.
These are getting a nice papertune at 39.5lbs at 28" draw. 36lbs gives 3" tare barechaft. 35lbs 4" tare and keep getting worse.
Easton Apollo 670.
These are getting a near perfect papertune at 40lbs. Behave almost exactly the same as Inspire 750. Anything below 40lbs will create large tares.
Easton Inspire 630.
These i only can get within a 0.5 inch papertare. My guess is they tune straight at around 45-50lbs.
Easton Inspire 570.
These are so stiff they are not tunable with my setups. My rough estimate would be that they tune straight at around 50lbs or more. I wouldnt use these for recurve target bows its way to stiff.
Easton Apollo 1070.
To be continued... I ordered a batch of these to run with 24-28lbs limbs to focus more on form/technic.
The correct spine groups according to me personaly. 28" draw target recurve medium 68" bow.
Easton Inspire 750.
Belongs to group T3(27-32lbs). on the Easton spinechart 2018. Id say they belong in group T6(40-44lbs)because i cant tune em at below 39lbs.
Easton Apollo 670.
Belongs to group T5(36-40lbs) on the Easton spinechart 2018. Id say they belong in group T6(40-44lbs)because i cant tune em at 39lbs or below. The higher quality in Apollo is significant versus Inspire.
Easton Inspire 630.
Belongs to group T5(36-40lbs) on the Easton spinechart 2018. Id say they belong in group T8(48-52lbs) for sure and just maybe can be tuned for group T7(44-48lbs).
Easton Inspire 570.
Belongs to group T6(40-44lbs) on the Easton spinechart 2018. Id say they belong in group T9(53-57lbs) for sure and just maybe can be tuned for group T8(48-52lbs).
Recurve medium 68" limbs , riser. Limbs range from 24lbs to 40lbs at 28" draw.
I just want to warn that i was forced to throw away about 4/12 arrows from every batch of x12 Inspire arrows because they was so "wobbly" and curved. Coach dont alow to use those during practice at the club. We talking about 0.5mm - 1.5mm after beeing cut.
I know this and Inspire are dirtcheap arrows so this was expected.
Hopefully this will help some to be able to tune there bows a bit more accurate with Eastons cheaper type of arrows and dont have to second guess the result.
A sample picture how a read the Easton spinechart.
https://imgur.com/a/6UcQ1w8
link to the pdf:
https://eastonarchery.com/wp-content/uploads/2018/10/2018-Easton-TargetShaft-Selector.pdf
Easton Inspire 750.
These are getting a nice papertune at 39.5lbs at 28" draw. 36lbs gives 3" tare barechaft. 35lbs 4" tare and keep getting worse.
Easton Apollo 670.
These are getting a near perfect papertune at 40lbs. Behave almost exactly the same as Inspire 750. Anything below 40lbs will create large tares.
Easton Inspire 630.
These i only can get within a 0.5 inch papertare. My guess is they tune straight at around 45-50lbs.
Easton Inspire 570.
These are so stiff they are not tunable with my setups. My rough estimate would be that they tune straight at around 50lbs or more. I wouldnt use these for recurve target bows its way to stiff.
Easton Apollo 1070.
To be continued... I ordered a batch of these to run with 24-28lbs limbs to focus more on form/technic.
The correct spine groups according to me personaly. 28" draw target recurve medium 68" bow.
Easton Inspire 750.
Belongs to group T3(27-32lbs). on the Easton spinechart 2018. Id say they belong in group T6(40-44lbs)because i cant tune em at below 39lbs.
Easton Apollo 670.
Belongs to group T5(36-40lbs) on the Easton spinechart 2018. Id say they belong in group T6(40-44lbs)because i cant tune em at 39lbs or below. The higher quality in Apollo is significant versus Inspire.
Easton Inspire 630.
Belongs to group T5(36-40lbs) on the Easton spinechart 2018. Id say they belong in group T8(48-52lbs) for sure and just maybe can be tuned for group T7(44-48lbs).
Easton Inspire 570.
Belongs to group T6(40-44lbs) on the Easton spinechart 2018. Id say they belong in group T9(53-57lbs) for sure and just maybe can be tuned for group T8(48-52lbs).