Home Forums Hunting & Shooting Hunting Optics CDS Dial Question

I am ready to order my CDS dial for my Leupold 3.5-10 VX-3. I have all the data for my load but which ballistic coefficient should I use for the 6.5 143 eld-x the G1 or the G7? The G1 is listed as .625 and the G7 as .315.

Good question, and I don’t have an answer for you.....
but if you’d put the question on the Long Range forum I’ll bet it will be addressed.

I would bet money Leupold uses G1, and likely doesn't even know what G7 is.

I'd just get it hashed in 1/4 MOA to adjust for all loads/bullets/atmospherics. As an added bonus if/when it doesn't track or return to zero you can then readjust easier...grin .

You should ask the guys engraving your dial. Don't ask a third party. Maybe they will use either according to your personal preference. Even though some would disagree, Leupold does know what they are doing.

That said, I would go with this:



Your custom engraved dial is only going to work with one bullet, at one velocity, at one set of atmospherics. Any deviation from those is going to cause a deviation in the amount of drop/drift. I guess it doesn't matter as much in PA as it does in the Western states, but bullets will fly quite differently at 70 degrees and 70% humidity than they will at 10 degrees and 40% humidity, particularly as you get beyond "standard" ranges for a particular cartridge.

Thanks guys. I did think of the MOA dial which came with the scope as new. It's a good option.

It really doesn’t matter. The important part is that the trajectory of your load actually matches whatever data you give them.

And I agree with previous poster that you’re better off with just the MOA dial.

Stick with the MOA dial as others have said.

You can use a tiny dab of different nail polish colors and mark on the CDS where your drops are for 300, 350, 400, etc. Nailpolish remover takes it right off when you change loads, elevation, humidity, etc. Still a crutch but works to the extent that the scope is repeatable ... see Greg’s comment.

I ordered one last week and it says very clearly which one to use in their online form. I don’t remember which as I was getting an MOA dial, but I remember that it heavily emphasized which one they wanted.