I hope it stays that way for you,
I always try to put 300 or so shots into a new string before I even attempt to get a tune on it.
They will always settle and creep for the first couple hundred shots.
You might want to keep an eye on it.
Second 3 shots 1/2" high tear (which is what I prefer).
Is the 1/2" high tear what you try to get for broadhead tune?
Good Luck