Originally Posted by J calvin
Ha guys i used my friends small stabilizer chronograph to find what speed i was shooting,it read 370fs from my tac 15i why is it shooting so slow ...
As jon.henry755 stated make sure you are using PSE's factory default 85-grain points. After that...
I would try measuring the arrow speed using another chronograph. If possible, one specifically meant to use with high-speed arrows or slow moving projectiles. Some chronographs are designed to not register objects below pistol / rifle velocities. Also some chronographs will reject or give bad readings when both the light-change sensors are both showing an object passing through at the same time. (aka long arrow vs. short bullet). One brand rejects any reading where the starting sensor is not triggered first.
If you are still seeing slow speeds there is a possibility that your TAC-15i's strings do not have the correct amount of twists in them to set the cams and limbs to their maximum energy areas.
My advice is to get a PSE TAC-15 expert to help you add the twists. It is not a simple process, in that you are not adding twists to the entire bow string. Instead you are adding twists to the "Y"'s loop ends that attach to the Cams' bearing shafts, and you can easily inadvertently torque the cams to where they lean.