To start with i google banks and a town . I map it out and go . I am trying to go to every bank within an hour and a half from my house. When in the town i may ask questions[depending on how it looks] and take notes. Is there silver?[note, not a question] Is there competition? Do you send them back? Do you ever get any halves? and the most important , do any of the other tellers have any? After hitting the town and reviewing the notes i will then have a good idea how long before i come back again. Keeping track of whether or not there is silver or competition is key. Some banks have regular customers they hold them for-- it will be 6 months before i come back if at all. Some tellers collect silver -- that bank has just become a dump bank. Some banks replenish silver -- im coming back in a month . Some banks send halves back --i leave my number to call but they seem to call only once.
As a veteran CRHer wrote on this forum - banks sitting by themselves in the middle of nowhere seem to do pretty good.
I do mostly bank runs and am still fine tuning my system. Feel free to ask here or pm me for questions.