I've been shooting all summer and feel that I'm shooting very well. My season starts in less than a week and I went out to sight in my bow with broadheads today. I am shooting the same heads as last year, (100 grain Thunderhead) and I'm shooting all over the place. I first shot a round of field tips and was on at 20 yards. I switched to broadheads and started shooting some high some low some left some perfect. tried to move my sight and got it down to two arrows are good and two are 3 inches high but straight up. Can this be fixed at a bow shop with some more detailed tuning or do I need to only shoot the two good arrows? Thanks.
Sounds like an arrow spine issue... may have to add weight to the rear of the arrow. Not 100% sure without watching your shot...
Are you indexing your broadheads? Make sure that your fixed blades are indexed with your veins. If they aren't its like having a 4th vein fighting against the other three. That could be throwing your shots off.
Do you use the same arrows non hunting as you do hunting? I had a similar issue years ago. I always used fixed blade 130 grain muzzy's with no problem. Same arrows except field points were 125 grain. I had an identical sight, set up for my hunting arrows because the heavier grain broadheads would drop considerably. All I had to do was swap sights. One year however just like you my arrows were all over even at 20 yds. 2 would be dead on, one 3inches right and a little high, next one might go 2 inches low left. I looked everything over put the field tips back on, target sights, and put all six arrows dead center. It was the same set up and the muzzy's never caused me any problems before. I took my bow to the archery shop and shot it through paper and had perfect holes through the paper. We took the paper tuner 1/2 ways down range and would have a slight tear. Took it down to right in front of the target and had almost a 3 inch tear on most shots. The archery pro was even dumfounded by the results. What had changed to cause this radical flight in arrows. He went back to look at his records which he keeps on all his customers. He was reading it off and said, Oh hell!! You always shoot right helical on your hunting arrows and I made them straight fletched. I had a couple old ones in my case and sure enough they were right helical. He apoligized for the mistake and made me a new dozen and everything was back dead on. The muzzy's were just not consistent flying with straight fletching thay had to have that right helical fletch to fly straight at 20 yds. or more.
Same arrows as last season, same everything. new string two months old have over two hundred shots on it already and I wax it about once every two weeks. Will go and shoot again tomorrow and make sure it is not user error. Could the blades having some chips in them cause a problem. I use two broadheads to practice with so I don't dull all my blades. and how do I turn my blades to match the veins?
I would suspect the only thing that has been changed and that is your string. Your tune probably got messed with some with new string loop, peep, drop away rest timing? etc... Not to mention it may have stretched a bit. I have intentionally shot badly bent BHs and the arrow still shoots fine if everything is tuned and properly spined. The heavier the arrow and the stronger the spine, the less it will tend to be steered by the BH. As far as aligning them you can use a BH wrench and pull them a little tighter generally or if you have metal inserts, a little filing on the blunt end will let the BHs rotate a little more but honestly I would rather just position mine to clear the riser. Do make sure the blades are not hitting the riser as you draw... that would definitely cause an erratic filght.
