Two quick follow ups: First, I don't believe any dimes that I search and return in full boxes get retaped and handed out to other CRHers. When I ask for dimes, I will often get a response like "I'm sorry, I don't have any new boxes, just those that you sold me. They are all open." Bank employees aren't going to retape them, they simply sell the rolls out of the box to merchants coming in. They certainly aren't sending them out to be verified by at the service center as that would accomplish nothing but driving up their handling costs. Second, I've only done a few thousand dollars worth of paper rolls so take this for what it's worth but I have not found any yeild difference between clear plastic (Brinks) versus the other carriers. The dimes seem to come in 1 or 2 per box no matter the source. On occasion, I get one that beats the average and at other times, I get a run of skunks (often full boxes of 2012s). Regional differences may exists elsewhere but in the PNW, they are all the same. However, there is another argument that could be made that I'll address. If you're buying less than a full, sealed box, then plastic rolls may not produce for you. There are MANY crafty tellers that would be able to spot the silver dime in the roll and keep it from themselves. Buy purchasing less than the full box, you may be getting pre-searched rolls in that way.
But for me, the clear plastics are just easier to dump. Let me be a bit more specific as to how it's easier. I walk in and throw 2 boxes on the counter. Because the merchant tellers all know me by name and fully trust that I've included 50 rolls in each box, they just hand me 5 $100s and I walk out the door. It's that fast. Now it used to be that they would open the boxes then "tray" the rolls to ensure they were all there. If there's a new teller, they usually ask what to do and the other tellers say "oh, it's him. just give him the money. those boxes are good." I have one branch that usually gets about 20 boxes a week. They let me look through the vast majority of those before they go out the door with other customers. And at that branch, there's a teller that CRHs and she tells me about her recent finds. I share some info about my finds, especially if it's something unusual (steel pennies off a magnet at the 1 coin sorter in the area comes to mind as an example).
In brief, in sealed boxes, I don't believe the rolls have been pre-searched because I keep finding silver. And paper produces no more than plastic in my area.
