Bobbie said:If you are in iron infested areas then stick with the small coil. I use a 12" SunRay coil on mine, it is great until I hit an area with a lot of iron, then it is almost worthless. Because of the slow response time of the Excal when a large coil passes over an iron target it nulls out and if there happens to be a good target close to the bad one, you will miss it.
Not if you hunt in AM/pinpoint