How far do Orchard Mason bees pollinate?

How far from the nest (in feet) will Orchard Mason bees travel to pollinate (in an apple/pear orchard)? In other words, what is their "pollination radius."

300 feet is the recognized maximum.

If you go to crownbees.com Dave will have MUCH information regarding the care and needs of these and other bees. I am currently getting a series of emails from him (automated) but all of that same information is posted on his site as well.