I don't have a Ravin, but I have several crossbows that I've shot and hunted with for years. They all shoot well, but beyond a point it's more a matter of who's shooting them and the arrow build. Buy junk arrows off the shelf and your groups at distance will show it.
I build my own, and I have for a long time. I've even done extensive testing with quite a variety of fletches and changing FOC from nearly balanced to extreme. It's a fun hobby that has had the additional benefit of also putting a lot of meat in the freezer.