Nock tension should be tight enough so the arrow can easily support its own weight when the arrow is hanging vertically on the bowstring (nock against the nocking point). To check this, hang your arrow vertically from the bowstring, and give the string a sharp tap with your finger on the...
GT accutough series nock, accutough insert, nock collar and ballistic collar included Weight: 400 (7.2 gpi), 340 (7.8 gpi), 300 (8.5 gpi) Manufacturer Downloads Gold Tip Arrow Spine Chart (IBO Speed < 315 fps) Gold Tip Arrow Spine Chart (IBO Speed > 315 fps) ...
Provides speed, stability, and strength Gold Tip's 100% carbon technology Straightness Tolerance: +/- .003" Weight Tolerance: +/- 2 grains GT Series nock and Accu-Lite insert included Weight: 500 (7.3 gpi), 400 (8.2 gpi), 340 (8.9 gpi), 300 (9.3