Custom turret replacement question

[Mog]

I am thinking of ordering custom turrets for my 300 win mag from nikon's "Spot On" custom shop. I have a nikon monarch 4-16x50 scope. I have never done the turret thing before and am confused about how to take the old ones off and place the new custom ones on properly. The manual is confusing and it sound like I am supposed to adjust the old turret to "0", unscrew the screw while holding the old turret in place with my fingers, put the new custom turret on lined up at "0", and re-insert the screw while ensuring the turret stays lined up at "0". Am I way off on this? It seems like this would throw my rifle's sighting in off, or is that what the new custom turret takes care of? I am obviously confused, could someone point me in the right direction?

[STOMP442]

If your rifle is zeroed now simply hold your dial so that it does not spin while removing the screw. Place your new turret on the scope with the zero lined up correctly with the line on the scope. Tighten the screw while holding onto the turret so that it does not spin and your done. Really simple.

[Mog]

Below are the instructions from the manual, is the highlighted part asking me to do something different than what you said above?

(3) Remove the protective cap of the knob by turning it counterclockwise. Align

the knob to the 0 (zero) position of the scale ring. This is to assure that the

scale ring will be correctly aligned to the new knob (the alignment position

should be remembered).

(3) With the knob held with your fingers to avoid shifting of the aligned scale

ring, turn the screw in the top of the knob counterclockwise with coin until

the screw comes out (Fig. 3-13). Then remove the knob.

(3) Insert the new knob into position and align the scale ring to 0.

(3) Insert the screw. By securing the knob with your fingers to avoid shifting of

the scale ring, turn the screw clockwise with the coin, until the knob in

firmly secured.

(6) Zero setting of knob (Fig. 3-14)

(3) After the reticle has been adjusted to the point of impacts, with the knob

held with your fingers to avoid shifting of the aligned knob, turn the knob

screw in top of the knob counterclockwise with the coin. Then lift the knob

up and align the "▼" with the index mark. It may happen that the "▼"

could not align with the index mark exactly because of the coupling pitch of

the knob with the shaft. And by securing the knob with your fingers to avoid

shifting of the knob, turn the grip screw clockwise with the coin until the

knob in firmly secured.

[Big or Bust]

Make sure you get a plain 1/4 MOA turret so you can use it for any load you ever want to shoot -

 

Don't limit yourself to one load...

[STOMP442]

Is your rifle currently sighted in? If so all you need to do is install the new turret so that the zero lines up with the hash mark on the scope. When the turret reads zero you should be hitting your target at what ever range you sighted your rifle into.

[willhunt4coues]

I dont care for BDC turrets, the BDC turrets are for 1 altitude, 1 load, 1 sightin distance. A lot can go wrong if you change altitudes and think everything will still be on.