I am new to the XT-70 but I have found these settings work for me.Vol 30,threshold 12,Tones 2,auto gnd bal,auto noise cancel,sens as high as I can get it(I dont mind the odd bit of chirping)run in all metal.I think you will find that if you slow your swing down the meter id gets more accurate and you can winkle out the good stuff from close by iron signals.I love this machine,its the best I have used,just need to get a couple more coils.By the way,its terrific on wet sand.I was pulling up coins from some depth.

Minelab X-Terra 70.NCMD,NSMDG.