FX Streamline - which medium rings?

Every manufacturer seems to have a different definition of "medium" and "high" when it comes to scope rings. The streamline was supposedly designed to be able to have medium rings clear the magazine. Has anyone found any 30mm medium height rings that work?

I picked up some BKL 300 rings but they don't specify an actual size however to me they look pretty high and I'm wondering if maybe there is something better?
 
I have Hawke Match 1" tube Mediums on mine and they allow 1mm between mag and scope tube and 8mm between 45mm OD scope bell and barrel shroud. However, I checked the Hawke website the same medium rings in 30mm show that they are 4mm lower than those for 1" tube so they definitely won't work. But their high mounts in 30 mm are only 4mm higher than the 1" mediums that I have which would give you 5mm clearance between the mag and the tube. That might be enough to clear your turret group - you'd have to measure yours. If the rings you choose don't clear the turrent group you need to be sure the scope you're using has enough free tube space to accommodate both the rear mount and the mag. I like these rings because they have double screws at both sides of the tube and also at the rail and seem to be very solid. They're relatively inexpensive too - about $20-$25.
complete measurements are found at http://www.hawkeoptics.com/mounts.html