I shoot a pse bruin with a nap shock blocker, quicktune 750, cobra releasealso a knock string with a knock inside, and im shooting a XX75 2217 30 and a half inch game getter aluminum arrow. Now from 15 to 35 yrds i group a beer cap to a cup size group But when i got some new arrows i got the new XX75 2217 new mossyoak breakup at 30 inch but shooting my 20 yrd pin i find my arrows fish tail compared to my game getters that didnt. Am i doint something wrong ive been shooting a month now and ill continue till this fall but im not sure if its me or my new arrows fish tailing or what help please.