The cache you seek is not at the listed coordinates.
Thanks to Depareo for pointing out some clarity problems with this puzzle, I have added some information.
America has a long and proud history with the quality and craftsmanship of their gun manufacturing. Daisy began building BB guns in 1886 and they're now built in Arkansas. Those are the little ones. The man sized variety are built by Derringer in Ohio and Ruger in Connecticut. Even bigger, the M1 Abrams tank is built in Ohio. But, if you wanted to go find the biggest guns made by Americans, where would you look?
Idaho (New Mexico)?
New York?
Massachusetts (Indiana)?
North Carolina?
Alabama?
Oregon?
Indiana (South Dakota)?
New Mexico?
Hmm...There's so many possibilities as to where they would be….