The arrows are easton axis 400s. So a 27" arrow with a 50grain brass insert and 100 grain broadhead, finished weight would be about 430 and pretty high FOC. Theyll be shot out of a bear effect 27" draw and 65lbs. Ive shot the same setup without the extra 50grains up front so will this extra weight weaken the spine? Should i go with a heavier spine?