Bob,
I like the Tiger Shark and always will but it is not a detector I go to for nugget hunting. I've had a bit of issue with it in high iron soils where most of my gold is found. I would like to suggest that you look into a Lobo or even a Vaquero for nugget shooting. The Lobo is a completely auto GB detector that I have found a lot of gold with over the years and the Vaquero is a good solid manual detector that I have used many times for prospecting and have found some gold.
Do not ever give up your Sand Shark. It is a solid detector with a lot of great features for beach and water hunting and will worth hanging onto.
Hope that helps.

Regards,

Kevin

Thanks Kevin I appreciate the info and I'll look into one of the detectors you mentioned.. I hope I get a chance to meet you before too long, until then Good Hunting!