Quote:
....content in the security rolls is often contaminated with older circulated coins,And thats a fact
If I were to find a single roll with current coins on either end, I'd open it, as I agree with the above.
However, The rolls I have sourced have been in sacks, weighed and sealed. When they are all 'new' I have a fair degree of confidence in the roll's contents. That is not to say that it can't or hasn't happened, simply that I have never, ever had a problem with (new)security company rolls when acquired in bulk.
I'll re-post my previous experience with the APEC $1. I bought a security bag of $1000 in rolls. I opened all of them, examined each under a 10 x loupe and kept 40 GEMS (no bagmarks, no nicks, well struck. There was not one other year coin amongst them.
I have done the same with 2004, 2005, 2006 and other $1 coin rolls. I have opened 100s of other denominations as well. Never found a coin, that was not representative of the entire lot. Lots of errors but no dodgies.