Leupold CDS

[Tgunz64]

Recently bought a VX5HD and ordered my CDS dial. What kind of accuracy are you guys getting with CDS dials? Just wondering if most have been pretty accurate (within a couple inches), or have some been way off. Thanks!

 

[North Idaho Hunter]

As long as you've got the correct velocity and BC I have had great luck out to 500 with them regardless of elevation - temperature or pressure.

Past that temp & pressure can make a difference.

 

[Tex LR]

Currently using several on various rifles. Seem to be very good as long as the info you provide is accurate. I have run mine out to 700 yards without issue.

 

[Tgunz64]

My biggest issue was I don't have a chrono and don't know anybody who does. So I originally went with the factory velocity. But then later I called Leupold and they adjusted it. All of my other numbers should be pretty accurate.

 

[North Idaho Hunter]

Without a known velocity coming from your barrel I suspect you will have pretty poor results with the CDS.

I've seen velocity vary in excess of 100 FPS when comparing chronograph to factory ammo advertised velocities.

I would strongly consider investing In a magnetospeed sporter chronograph.

 

[Tgunz64]

Without a known velocity coming from your barrel I suspect you will have pretty poor results with the CDS.

I've seen velocity vary in excess of 100 FPS when comparing chronograph to factory ammo advertised velocities.

I would strongly consider investing In a magnetospeed sporter chronograph.

I'm shooting Hornady Superformance. Leupold said Hornady tests with a 24" barrel to get velocities. Mine is 22". So they knocked 100fps off and said that'll get you really close. All of my other info is pretty much exact so I imagine it'll be pretty close. I'm not expecting perfect but if it's within a couple inches I'm ok with that. Only shooting it will tell. Worse case scenario I pay for a new dial

 

[BULLBLASTER]

Without a chrono you should shoot distance and count your elevation correction and give them that info along with weather and elevation and bullet info.

 

[SMK1000plus]

My biggest issue was I don't have a chrono and don't know anybody who does. So I originally went with the factory velocity. But then later I called Leupold and they adjusted it. All of my other numbers should be pretty accurate.

Unless you shoot YOUR ammunition, in YOUR rifle, in YOUR conditions that you expect to shoot in, including; atmospheric, elevation, temperature, etc., at the actual ranges you have Leupold index on your dial, and you properly document all the data, especially your elevation adjustments (come-ups) for each distance, and then send them to Leupold, they are going to have to rely on ballistics calculations based on the velocity and other data you provide, to make your custom dial. If you provide them with incorrect data, or if they estimate your expected velocity or other data incorrectly, you are going to get incorrect dial indexing! How far off the dial will be from such errors, will be directly proportional to the error that is input.

As with any ballistics calculations; "junk in equals junk out!" BUT, with the proper inputs, today's ballistics calculators can be very accurate.

 

[mpayne]

I have one and found them to only to be as good as the nut behind the bolt, bad info in bad info out. that being said its a great system and so far repatable

 

[HobieH3]

"The nut behind the bolt". LOL!

 

[SpeedGoatShooter37]

Another overlooked item is getting the scope on level. If it's not on level, you'll impart windage error when you change your elevation dial, meaning as you track up or down in elevation, the POI will also start moving left or right in addition to the up and down as you change the elevation. Minor at less than 200 yards, but gets exponentially worse as the range increases.

A good way to make sure your scope is on level is to do a tracking test. Zero your rifle, then run up the elevation 4 or so MOA. As long as the next shots are falling directly above your zero point, your scope is level.

 

[Tgunz64]

Another overlooked item is getting the scope on level. If it's not on level, you'll impart windage error when you change your elevation dial, meaning as you track up or down in elevation, the POI will also start moving left or right in addition to the up and down as you change the elevation. Minor at less than 200 yards, but gets exponentially worse as the range increases.

A good way to make sure your scope is on level is to do a tracking test. Zero your rifle, then run up the elevation 4 or so MOA. As long as the next shots are falling directly above your zero point, your scope is level.

I've leveled the scope with a leveling kit. Also backed it up with a laser leveler as well. So that should be on as far as leveling goes.

 

[foul bore]

All good info, I have 3 CDS scopes, and all are very close, You sure have to send in accurate info, as others have said to get good results.

 

[Tgunz64]

All good info, I have 3 CDS scopes, and all are very close, You sure have to send in accurate info, as others have said to get good results.

All my info is accurate just don't have an exact velocity. Can't get the velocity when you don't have a chrono. The stores around here don't sell them. And with the money I ended up having to spend the last couple months it's going to be a while until I get one. Like I said before if it's way off worse case scenario I pay for a new one whenever I can get it to a chrono. But Leupold thinks it'll be pretty close with the adjustment. Only shooting it will tell for sure.