Here are the numbers 0.05 gram test is 100mm to 110mm = 10%
0.1 gram test is 210mm to 240mm = 14.3%
20 cent coin test 550mm to 640mm = 16.3%
These tests are educational and point out that no matter what it is, the performance can always be improved. Woody at detectormods.com
There are more improvements that i am testing, might have to go back out over old ground to get the big ones missed in the past.#gpz7000 #metaldetecting #minelab