File Fit rings

Is there a certain range of file fit rings that will work with a certain bore.

I have 4.070" bores (30 over 340) but since I am filing the gap, could I use file fit rings for a bore +/- a certain amount? For example a much more common file fit ring for a 4.060" bore in a 4.070" bore? How about 4.065" in a 4.070"

You would need a 4.075 ring.

So long as the end result is that you have the correct gap of "X" it doesn't matter if you are starting with 4.060 or 4.070. But I think it you try, there will be too much end gap using a 4.06 ring in a 4.070 bore. Not to mention the tension might be a little lighter. That may be a good thing in a race engine... I always use the .005" larger ring.