I once bedded a Sendero with the scope still attached(6-18x40AO Leupie in DD lows w/ approx 1/16" clearance). Later down the road when I removed that scope there was a nice impression from the bbl contacting the AO knurled portion from when I whacked the bbl with a rubber mallet. Not that it pertains to this topic, but even heavy bbls have alittle more flex than some folks realize.
I've seen many scopes you could barely slide a business card under that shot quite well. I usually have 1/8-1/4" myself as medium height rings seem to align better for me and most of my Obj are 40-44.
