Having had a play with 10's of BSA/Nikos over the years it more than likely wont work, the gaps can get smaller and will not work as well anyway.
I have only come across about 6 BSA's that benefited and worked well by reducing the max range, no Niko as yet.
It can focus at a closer range but this induces other problems as vagueness, grain and darkness within a small degree of rotation of front lens assy. You need it to snap in and out, it aint a Leupold or Burris.
At best a negligeable increase of 10 to 15% wider gaps, personally i would concentrate on the control makes no odds whether 1mm gaps or 20mm gaps if your wrong.
Mine came down to 10 yards on 50mag out the box, wang it on 10mag you could get a shot off at 6 yards if need be.