I have yet to find the time to go nugget hunting yet but when I do I plan on using the 6X10 DD. The DD widescan coils will handle the more mineralized soil common in nugget hunting areas better than a concentric coil. I've read some good things about nugget shooting using the 1400 also.
Yes, a smaller coil does not have to deal with as much soil thus minimizing the affects of the mineralization. A smaller coil is also more sensitive to smaller targets. But you generally lose some depth with a smaller coil. And we all know how deep gold likes to go. All the way to bedrock eventually. So like many things in life there are trade offs.
Excal 1000, Excal II, Sovereign GT, CZ-20, Tiger Shark, Tejon, GTI 1500, Surfmaster Pulse, CZ6a, DFX, AT PRO, Fisher 1235, Surf PI Pro, 1280-X, many more because I enjoy learning them. New Garrett Ca
Enough said. The smaller coil alows you to get between the rocks and brush where a larger coil can not get into, plus it is more sensitive to tiny nuggets and flakes.