Are you currently utilizing a Ravin Crossbow, and if so, what type of bolts and tips are you using? Specifically, are you using a target tip or a broadhead?
I have encountered a similar issue with my crossbow. I found that certain mechanical broadheads would either partially or fully open in flight, disrupting the true flight of the bolt due to the high speed of the crossbow.
Personally, I use Grim Reaper Whitetail Specials 100-grain mechanicals, and have found that they fly true and straight. It's worth noting that where you hit the target can also make a difference. If you're hitting all over the place, it's likely due to the tip being too high or low. In this case, you'll need to adjust the speed setting on your scope accordingly.
My scope, for example, is set at dead-on at 20 yards, with an option to adjust the speed setting based on my crossbow's speed (in my case, around 384 feet per second with a 400-grain Barnett bolt and 100-grain broadhead). To achieve optimal accuracy, I had to step out to 30 yards and adjust my bow's speed to 375 feet per second. With this setting, I can achieve dead-on accuracy up to 100 yards. One important note is that I never use a target tip to sight in. Instead, I always use the tip I plan to hunt with.
I hope this information proves helpful to you, and good luck in your hunting endeavors.
