isItFallYet
WKR
- Joined
- Sep 24, 2019
- Messages
- 949
There are similar threads, and I didn't want to hijack them. So... I think I may be underspined, but I shoot well out to 80 yards with this setup, but there's always room for improvement, right?
My setup:
Mathews Vertix 70lbs
243 IBO
5mm axis @28"
100 grain QAD Exodus bh
Finger release
No added weight, and a total of 416 grains (not too concerned about increasing weight because I know this arrow can kill an elk at 68 yards)
I have been shooting 340 axis 5mm, but after looking at Easton's calculator, it looks like I should use a stiffer arrow. I'm about to buy another dozen arrows, and am wondering if I should increase the spine.
Easton says to add 5lbs if ibo is over 340 fps, add 5lbs if brace height is less than 6.5", add 5lbs if using a finger release.
so...
70lbs + 5lbs (343 IBO) + 5lbs (6" brace height) +5lbs (release) = 85lbs with a 28" arrow.
The calculator says to use 240-300 shaft size.
Keeping in mind that I only have a month to retune, would you make the change, or would you continue with what has been working?
My setup:
Mathews Vertix 70lbs
243 IBO
5mm axis @28"
100 grain QAD Exodus bh
Finger release
No added weight, and a total of 416 grains (not too concerned about increasing weight because I know this arrow can kill an elk at 68 yards)
I have been shooting 340 axis 5mm, but after looking at Easton's calculator, it looks like I should use a stiffer arrow. I'm about to buy another dozen arrows, and am wondering if I should increase the spine.
Easton says to add 5lbs if ibo is over 340 fps, add 5lbs if brace height is less than 6.5", add 5lbs if using a finger release.
so...
70lbs + 5lbs (343 IBO) + 5lbs (6" brace height) +5lbs (release) = 85lbs with a 28" arrow.
The calculator says to use 240-300 shaft size.
Keeping in mind that I only have a month to retune, would you make the change, or would you continue with what has been working?