I haven't hunted that many dimes but what I have searced it doesn't matter that much though I prefer machine wrapped you don't have to worry about them being short 99.9% of the time, like you do with customer rolls. As far as volume searching, I cannot comment on dimes but currently I am attempting to search a box of nickels a day for a solid year, I tried once before and got burnt out after 8 months. You can most likely get a box a day if you have a lot of banks in your area. I have a bunch and they keep extra nickels on hand for me. The dumping is the only drawback though dimes are easier(lighter) than nickels. Thanks and Good Luck. Dennis.