I use target scopes. On a piece of masking tape on the rifle, I note the elevation for each distance. Looks something like this:
100 2-1
200 2-3
300 2-6
400 2-9
The first digit is how many revs the turret is from the bottom. Each rev reveals another mark, so this is easy to count. The second digit is how many minutes on the turret.
I also back the turret up a few extra revs and paint a stripe on the inside turret. Then I screw the turret down to 300 yard setting and make a mark on the painted stripe with a pencil, showing the location of the turret at a 300 yard elevation. This gives me a visible location to see what 2-6 looks like.
If it have to move up to 3-9, it is dead simple to crank it another full rev and then set to 9.
I use typewriter white out to make the mark, or grey primer paint.
Here is the turret with the grey paint. The cope is set to 300, so you can't really see the pencil line at the edge of the turret.
My other scope mod is for the wind turret. It too has a pencil line to show where zero is, just in case I try to start a match a full rev off zero.
If I want to dial in 4 minutes of right wind, I like to know which way to turn the knob, and alter, i need it is easy to tell at a glance how much (and left or right) wind I have on. I experimented with my computer and printer to make the right size paper strip to put around the turret.
Right wind is in Green.
Left wind is in red. So If I put on 2 minutes of wind, the knob will read 2.
These mods cost nothing and reduced my knob twiddling mistakes to zero.
