I see posts all the time asking about this, so thought I would post a simple how-to:
It's not voodoo or anything, all you are doing is stopping a screw (your elevation adjustment) from going into a nut (your scope) too deeply.
Here is one way, a simple O-ring (gotta find the right size and thickness) dropped into the bottom of the turrent base....
Here's another, more precise way, buy a nylon washer (or several) from Lowes or wherever, and drill the center hole and/or cut down the outside to fit the size you need.
Then you can file or sand down the thickness to get exactly where you want it to stop.
Note the two different locations, the O-ring is down in the bottom of the groove and the nylon washer is at the top. It doesn't matter, either one will work either place.
Shown is a Leupy scope, but most brands are similar. Some scopes can be drilled for a small setscrew in the top of the turret that will touch when bottomed out.
But they all do the same thing, they are simply stopping a screw from going too deep into a nut. Look at it that way and gets simple.
CAUTION: If you install one of these and bottom it out with a ham fist repeatedly, you may end up stripping the fine brass screw threads, take it easy. I've heard Nightforce will not warranty this damage, it will cost you if it happens.
Also, there is no need to get it precisely on "0", I usually leave mine a full 1/4-1/2 TURN under zero. This also keeps me from smacking the bottom every time I adjust, possibly damaging the fine brass threads.
All I want is a way to know I am not a full turn or more under zero.
It's not voodoo or anything, all you are doing is stopping a screw (your elevation adjustment) from going into a nut (your scope) too deeply.
Here is one way, a simple O-ring (gotta find the right size and thickness) dropped into the bottom of the turrent base....


Here's another, more precise way, buy a nylon washer (or several) from Lowes or wherever, and drill the center hole and/or cut down the outside to fit the size you need.
Then you can file or sand down the thickness to get exactly where you want it to stop.


Note the two different locations, the O-ring is down in the bottom of the groove and the nylon washer is at the top. It doesn't matter, either one will work either place.
Shown is a Leupy scope, but most brands are similar. Some scopes can be drilled for a small setscrew in the top of the turret that will touch when bottomed out.
But they all do the same thing, they are simply stopping a screw from going too deep into a nut. Look at it that way and gets simple.
CAUTION: If you install one of these and bottom it out with a ham fist repeatedly, you may end up stripping the fine brass screw threads, take it easy. I've heard Nightforce will not warranty this damage, it will cost you if it happens.
Also, there is no need to get it precisely on "0", I usually leave mine a full 1/4-1/2 TURN under zero. This also keeps me from smacking the bottom every time I adjust, possibly damaging the fine brass threads.
All I want is a way to know I am not a full turn or more under zero.