Hi rotty23,
I find that if you are in trashy ground, you need to go a little slower than when detecting at the beach. For instance, in trashy ground, I take up to 3 seconds to do a one metre sweep, (a foot a second), in just one direction, nice and steady, then stop once you get a good signal, go back slowly to that signal, so you don't carry over the possible trash reading onto the good target. Then pinpoint as usual. Sometimes I have to slow down even more if the trash is very condensed especially when I know that there are several readings in one spot. In one hole I dug, I had a bunch of rusty nails, and below them, at about 9in deep pulled out an 1898 British halfpenny. I could have lost the signal if I didn't slow right down. At the beach, unless it's highly mineralised, you can generally speed up your swing, as your not dealing with the same type of trash found on the goldfields, other than the pulltabs and caps! I take about 2 seconds to a meter sweep, in one directon when working the beach. Try this: place two different types of targets side by side at six inches apart, discriminate against one of the targets, then do a sweep and see if you are carrying the null over the target. If you are, you need to slow down in your sweep. Hope I've helped.
Regards Angela