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″.