Doc, do you know the part number of the contacts you used? They vary in max ID.
Alan B said:
The 30 amp contacts are silver plated, the 45 amp contacts are tin plated.
They come in both tin and silver platings. However
there really isn't a '45 amp' contact - just '45 amp pre-mate ground' contacts. The main contacts are just marked '15-45' and give suggestions on strand count, awg, and mating force.
Looking at the catalog, the '200G3L-lpbk' (http://octopart.com/partsearch#!?q=200g3l-lpbk) is for silver plated, 10-14awg high strand (ie Turnigy) wire, in loose (non-reeled) form.
There is another contact for 10awg wire (261G3-lpbk), but it's inner diameter is smaller by .7mm.
screenshots of catalog:
http://i.imgur.com/q35xAMW.png
http://i.imgur.com/wce8XT2.png
A few months back I bought pretty much every size/combo of anderson pp15-45s and came away with the knowledge that buying 'reeled' connectors suck

... loose pieces are worth the 20% markup.
Alan B said:
totally against soldering these connectors.
Word. Same goes for most every connector vendor.