Hi Shawn,
Per your inquiry concerning the basis of my offered considerations, I hope the following response alleviates your concerns. Normally, I use Stu’s Calc for focusing on Dynamic spines that have worked with many of my set-ups that are Hi range EFOC or Ultra-EFOC. The differences in the dynamic spine and the bows-arrow required spine may be in the 25# range. His system seems quite accurate for normal and lower range EFOC.
Just a recent example:
I have 350 shaft w/350 gns up front that bare shafts nicely at 25 yards.(51@ 28 – 30% Ulta-EFOC). Stu’s calc yielded that a 225 gn(24%-EFOC) up front on the same 350 shaft should put me close. This set-up too, also bare shafts nicely at 25 yards w/o any modifications.
Per Stu’s Calc which actually has the Samick Sage listed:
***The 1st possible consideration using Stu’s Calc yield an Arrow spine 60.1 vs 61.3 Bow-Arrow Dynamic spine required spine***
Length - 27.5
100 gn insert
200 gn pt
tot arrow wt -487
12.3 gpp
29.2% FOC
and
***The 2nd possible consideration using Stu’s Calc yield an Arrow spine 61.4 vs 61.3 Bow-Arrow Dynamic spine required spine***
Length - 28.5
50 gn insert
200 gn pt
tot arrow wt -444
11.2 gpp
26.4% FOC
My area of uncertainty, besides the reality performance, is that I have never dealt with such a short arrow that seems to naturally permit such hi FOC by utilizing arrows with low gpp to spine ratios.
Best regards,
Friend