Good product, but.... - Burris XTR Signature 34mm Rifle Scope Rings

I have several sets of these rings and they normaly perform very well for me. The 34mm, not so much. Unlike other manufacturers, on the Burris 34mm, the part of the base that engages the cross slot on the rail is integral to the ring base. On the set I received it is too wide to go into the cross slot on several of my rails.it is not unique to Weaver or Picatinny type rails, nor to rail manufacturer. It is a problem that can be overcome with careful file work, but not what I have come to expect from Burris.