Okay,I have been shooting for quite some time now and I shoot instinctivley. I have gotten to point where at 30 yrds I am shooting tight groups. but for the past 2-3 days I am starting to shoot like a shotgun! I do shoot fingers and have been shooting so much these past few days my middle finger is num like. I am suspecting that my knock is slipping, it is string nock. I haven't been anticapating, have been following through and all. I just dont know. Sometimes i'm there and sometimes not. Any suggestions at all, while i play with the nock, would greatly be appreciated. Thanks Guys!!