I plan to shoot the replacement Savage sent me within the next couple of days. My FFL talked to the Savage folk and they confirmed that the B.MAG should have a floating barrel and, according to my FFL, sounded incredulous that the forend should have a banana shape and contact the barrel. I will report my findings here after I shoot it.
I started to fix the (two) points of contact with the barrel by grinding away on the webbing in the forend, but before "fixing" the problem I realized that I had accomplished two things: First, I had voided the warranty and 2) I had weakened an already flimsy forend.
To "lift" the barrel off the forend, I inserted a washer in the forward counterbore of the forend attach point. But then I could not get the trigger guard to latch into place. So I removed an "E"-clip at the forward end and stick it underneath the attachment point on the barrel to raise the attachment bracket. It is now free-floating. How it shoots will be determined in a few days.