I agree with the captain but also think location and holding the TX as steady as possible has a lot to do with it .
I fly mostly from a hill where I have nothing between the TX and the AC and have 0 noise .
In that spot this is the norm
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Now in this spot I have a tree line out about 3500' and have to go higher to get out
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Location really is important and experimenting where you are a little at a time like the Cap said will find what you need to do if what your after is distance runs .
I have over 500 flights with the Standard and the 4K with the panel and I go out till I lose signal and just let it RTH .
If you don't trust your RTH I wouldn't even attempt these trips . Just takes time to learn your bird and where you are flying .
If you look at the log shot's you will also see there is nothing under me but tree's . I would never attempt these trips over anything else .
Experiment with settings in you app and have fun but do know where you are flying .