It's depending on the X-tal used in the Transmitter and receiver.
Best is to put txin100uW(rangecheck) put antennas, tx and rx fixed distance,don't move during tuning. Then find the min bind and max bind and set in the middle.
Just to post your values and give an idea on the ranges, I opened a topic, however absolute values are different for everybody.
www.deviationtx.com/forum/3-feedback-que...ncy-tunes-here#68335