JakePhelps said:
trust me they would be NEAR useless where i am...every swing has at least 5 square nails

? I know theyre 100 years old but theres only so many i wanna dig in one day
The area you're describing sounds like it's very old, and worth some serious effort in removing the junk to possible find some nice relics & coins. This is what I would do if I felt it was worth it in an area like that.
Step 1: When & if the soil conditions allow (assuming there's no grass in this area), take a rake used for raking concrete and rake the soil to remove any/all the nails you can. If you have free access to this land, and there is grass in this area, rent a sod cutter, and remove the sod (which will remove the top 3 inches of grass/soil) and then rake it to remove any/all nails & junk that you can. If the area is too large to rake by hand, use a riding lawn mower that accepts a rake unit, and do it that way!
Step 2: Detect the entire area for 1 day (8 hrs) with the highest level of disc. your detector has, and repeat the process daily setting the detector 1 notch/# lower on the disc. each day until you've searched it with the lowest level of disc. This will allow you to pick/find all the goodies from the shallowest to the deepest while removing more, and more trash/junk as you go (yet also not so much in any one day that it's too much to dig/remove). After you've searched it with the lowest level of disc. and removed as much junk/nails as possible each day, now search it in zero disc. and find the deepest & oldest stuff left in the ground/area!
Step 3: After you've searched the area with one detector as described above, repeat the process with a different brand/make of detector (preferably higher end), and find the stuff that the other one missed!
HH
Lonewolfe