When installed, they will leave slack in the chains, especially as the chain wears. That said, the slack will be slight but present. More troubling is the fact they can't hold a +/- 0.001" size spec on the parts. You could have had the parts made locally at, you guessed it, your local real machine shop and probably not pay anymore, perhaps even less. The 0.200" dimension is something Hyland came up with years ago after experimenting with what worked best.
In the end, it is your call. Most people would install them as is because they don't know who originated the parts or what the dimensional specs should be compared to what they got. However, if you attempt to return them to WR, they will likely be uncooperative, telling you there is nothing wrong and they have XX pieces in the field performing adequately.