Congratz on the silver! Ive never tried nickels before, only dimes and pennies. All ive come up with are a couple wheats, a few King George's ( Canada ), AND A 1968 50% silver dime for my hard work...
Nickels and halves are the way to go. Dimes sometimes, but i just love nickels.
9 War nickels so far this year, and over the years, I have been able to find an entire set of Jeffersons (1938-current) Only missing the 39-D, and 38-s, but found the 50-D
Keep at it, those nickels are fun because you are guaranteed to find old coins in every box.