If you have an ILS on your intended runway - life is good. Otherwise work for a 3% / 3 nm per 1000 slot somewhere on finals. You have plenty of leeway above this - but not a lot below it. Work on the profile accordingly.
Do you really think that's sustainable in a glide in a B7x7? 3 degrees (an ILS) requires a L/D ratio of 20. 3% requires an L/D ratio of more than 30.
I don't know what the numbers are for best L/D, but if you can get 20s and 30s they're impressive!