Swaro variable...about 80 rounds.

Zeiss variable....about the same.

Leupold variable(s).....lets say 50-500. Sort of a WAG because there have been a few.

One M8 4X Leupold.......about 4000 rounds through 300,338 and 35 caliber magnums.




The 280 Remington is overbore.

The 7 Rem Mag is over bore.