I am using slicks and mine weren't hitting quite the exact same as my field tips...just as you have mentioned. I used the Easton tuning guide and did the broadhead test and using the exact chart that OGW has posted for you, was able to get both broadheads and target tips hitting perfectly. You can also download a PDF of the easton tuning guide from easton's website. Start with the tuning guide and work out some of the tuning issues you might be having...I beat you aren't quited as in tune as you may think you are. Let us know how it goes...