trying to tune with arrows you think are not correct can be very very frustrating. Why bother.
I would sit down and figure out what bow set up I planed B50, FF string, Quiver attached? or not. What silencer on the string? cat whiskers, hush puppies Walmart wool homemade. Get your bow set the way you plan to hunt. If you are using Stu's calculator the center cut and string type can make a huge difference on out come. Call Martin and find out what the center cut is or measure it yourself do not guess.
Now it is time to sit down and do some reading
Longbow and recurve tuning . I suggest you print it out, read it and and make some notes.
Stu's calculator will get you in the ballpark and sometimes right on the money. Adcock's tuning will help you get right on.
Having consistent form really pays off.