I've got the standard height on my Tikka with a 42mm Monarch and there's not much room, I highly doubt it would clear a 50mm.
I use a Deadnutz low with my Nikon Monarch 42mm/Tikka and it just barely clears.
Tikka T3:
Mount fits both left and right hand firearms.
Base screws are 6-48 X 1/4″ long. Ring screws are 6-40 X 5/8″ long. Both screws use a 7/64″ Allen wrench.
All T3 actions are the same length. Outside to outside of rings is 4.08″. Standard rings have 2 screws per ring and rings are .63″ wide. Tactical rings have 4 screws per ring and are .80″ wide. Hole to hole spacing dimensions are .86″, 3.25″, .86″. Height of mounts from top of receiver to centerline of scope tube is low .94″, medium 1.06″, and high 1.19″.