Bolt flight question
I have a 150 lb Horton exp. Problem is I can see the bolt corkscrewing in flight. I'll sight it in at 20 yards then my point of impact changes at 15,25 yards. I have tried carbon and aluminum bolts. 100 and 125 grain heads. Field tip and broad heads, all corkscrew. I have a fairly new string, my limb bolts are tight. I make sure to pull the string back even. My compound bows are easy to fix this problem with some rest and nock tuning. I'm sorta stumped as how to correct my bolt flight. Only thing I can think to do is back out one side or the other on the limb bolts. Is this going to change anything? What am I Missing as how to correct this problem. I can answer any questions to help tune this crossbow. Thanks