As far as I know this is still on a batch by batch basis. The older sears were too soft and wore, now the new ones may be too brittle and crack
Either way, PMI customer service is great and will replace it hastily for no charge.
I recieved one of the newer sears and I notice wear(hmm 1000 shots?), but it doesnt seem to be an abnormally large amount. I will report whether it holds up next time I play (which may not be for a bit, unfortunately).