As you're probably aware, the reason there are so many more choices in arrow spines for compound shooters is because variables such as draw weight, draw length, arrow length and tip weight
all influence dynamic spine--the flexing of the arrow at the shot.
A left tear (for right-hand shooters; reverse for left-hand) indicates an arrow rest adjusted left of center-shot, an arrow not stiff enough for draw weight and/or draw length and tip weight
. Move the arrow rest-arm toward the riser (inward), decrease draw weight, choose stiffer-spine arrows, shorten the arrow (when feasible) or choose lighter tips to decrease arrow flex after release.
becomes a function of FOC or Front of Center.
I then selected hard cams from the first drop-down menu and picked a 125-grain broadhead from the tip weight
Tuning the amount of tension exerted by the plunger will compensate for differences in arrow spine, tip weight
, bow weight and the amount of pressure applied from a particular archer's release.
Experiment with as many arrows as possible and change tip weights
before purchasing new shafts to determine if flight improves and groups tighten.
By combining various blade widths of their .020-inch-thick, hardened high-carbon stainless blades with different tip weights
, Innerloc is able to assemble 16 various broadheads.