scope zeroing

gunning84

i just picked up my new cz 527 .223 on saturday so happy days:D the only thing i cant solve is when im zeroing the scope the bullet is hitting to the right of the target and the turret is screwed into the last and is still bout a half an inch off, any advice would be very welcome thanks

tomcat220t

What make is the scope ?At a guess ,your scope is not mounted square to the rifle ....

Cass

Your scope is not sitting correctly in the rings, or the mounts are slightly twisted meaning that when your scope adjustments are centralised and you place the scope into the rings you are immediately "off".

Resolution is easy enough. Take off the scope and dial the elevation all the way down to the bottom ( 0 moa/clicks). Count the MOA/clicks on the windage and if its (for example) 50 MOA set the turret to 25 MOA. This is your central position. Next step is to check the alignment of the mounts. Remove them and clean the area where the mounts attach. Make sure the is no dirt, grease, oil, any fouling that would have the mount sitting anything other than square and perfect. Also check that the correct mounts are in the correct position. By that i mean the front ring is at the front. Most rings/mount systems can be used front and back however some systems like the optilock or Ruger mounts can only be used in certain positions.

Anyway once you have the area clean and clear and you are sure the rings and mounts are correctly positioned re-attach them and tighten. Remount the scope and re-zero using my old tried and tested technique:

If installing the scope the quick way would be to place the rifle in a gun clamp or very steady front rest and back bag. Place a spirit level on a flat section of the rifle. If none can be got or trusted take the rings apart and screw on the bottom section of the rings leaving the top piece of. Tighten these down. Now place a level across these rings and straighten the rifle. Once your happy, place the scope into the rings and place the top section of the rings on the bootom section over the scope and screw in the screws but DO NOT tighten.

Have a heavy string/line hanging from the ceiling of your hall (at the end of the hall). Weigh it down if necessary. This will give you a dead straight vertical line. Have the rifle pointing towards the string and adjust the position of the scope forward and back in the rings until your eye relief is good (that there is no black when you look into the scope) Twist/turn the scope until the vertical line of the crosshair tallies with the string/line hanging in your hall. Once happy tighten the screws on the rings but do so in an alternating fashion as if you tighten one side fully it will twist the scope in the rings. Problem i find with some lads is even though the crosshairs are perfectly straight everyone holds the rifle at a slight cant and so when they put it to their eye they think the crosshair is leaning. Its not. Resist the temptation to adjust it as canting the crosshair to suit your hold will mean any clicking to zero the scope will result in angled adjustments rather than perfectly up/down or left/right adjustments.

Go to a range or find a fixed spot at home. Somewhere around the 50yd mark is grand. Have the elevation of your scope trned down to zero. Have the windage adjustments centralised. As in if there is 50 minutes (moa) of adjustment have it set for 25moa. Have the bolt removed and with the rifle unclamped adjust the rifle until you can see the target down the barrel. The muzzle of the gun will appear as a circle and must sit perfectly "central" in the circle created by the breach. Once this is done make sure the target is central in the circles created by the muzzle and breach. Have the rifle reclamped making sure the target is still central in the bore/barrel. Now without moving the rifle look through the scope and see where the crosshairs are in relation to the target. Adjust the crosshairs up to and left/right until they meet the target. Now once more check the bore/barrel sight and scope sight. If you are happy both are pointing at the same target time to replace the bolt and fire a shot (this is why i recommen doing this at a range). Find where the shot impacted. Measure the distance from your point of impact to the target bull and adjust your scope as necessary. gain fire another shot. You should be either in or very close to the bull. Make one more adjustment if you are not in the bull and fire one more round. You should be zeroed at this point

If you find the scope is still presenting the same problem the quick solution would be to shim the scope for windage. Personally i do not like doing this as you are overcoming the problem rather than resolving it (if that makes sense). The proper solution is to swap the mounts/rings and try again and if that still fails then try using either ring alignment rods or possible a lapping tool to work out imperfections in the rings.

Try some of the above suggestions and see if the problem gets resolved. A handy idea if you get different results is to write them down so you know what you done and what effect (if any) it had on the alignment of the scope.

gunning84

its a swift 6-24-50 thanks for the advice ill attack it later and se what the story is

clivej

I found that sometimes it helps to reverse the mounts around the other way. Meaning oif the mounts screws are on the right hand side put both mounts so that the mount screws are on the left hand side.

it works - strange but true .

FOXHUNTER1

It could be the mounts,
The CZ 527 needs a particular type of mount as the reciever has a notch cut out for the mount to sit in.
Only one of the mounts has a tooth on it to sit in to the notch.
If the wrong mount is put in the wrong place it will cause the problem you have.

Cass

FOXHUNTER1 wrote: »

The CZ 527 needs a particular type of mount as the reciever has a notch cut out for the mount to sit in.

Depends on the model as mine has not got it. Its the Kevlar version. Haven't seen other models without scopes so cannot comment on them.