Jump to content
Rimfire World Community
Visit Brownells Visit AR15 Builder Visit Visit Site Visit Ballistic Advantage Visit Aero Precision Visit Cabelas

Why align your your scopes reticle?


Recommended Posts

Think of it this way. Imagine sighting in your scope which is mounted at an exaggerated angle of 45 degrees to the right on a level range at 100 yards. It would work fine without issue as long as you dont change any variables. Now what happens if you move your target out to 300 yards and you adjust for elevation with the scopes elevator knob? Your bullets impact would now be several inches off to the right. Why? because the elevator isnt traveling perfectly straight up and down relative to the bore. Therefore the more elevation you dial in the farther off target you will be. All this on a flat range. Now what happens if you have to shoot up or down hill?

An easy way to test this for yourself is to take a level to the range and on a big target draw an upside down "T" that is level and square.  Aim at the intersection of where the 2 lines meet. Take a few shots and raise the elevation a few clicks and fire a few more rounds. Repeat this several times to see if your hits travel in a straight line parallel to the vertical line. If the string of hits follows a linear line in a direction away from your vertical the scope is not level to the bore.

Look at the images below for an easy understanding, but to put it simply the point of impact change will match the angle the reticle is offset from the rifles bore..


Link to comment
Share on other sites

Thanks for the info, now today can't be a waste I learned something new.

The scope I have on my Marlin is the first scope I've ever owned. Out pure dumb luck I must have gotten it on right because when I sighted it I did horizontal  first. After I got it to the center line and started on the vertical it marched right up the center line.

Still I think I'll check it again using this method.

Link to comment
Share on other sites

  • 4 months later...
  • 9 months later...

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...