help with leupold custom dial

S

skindaddy

New member
want to get custom dial for my 7mm rem mag and need some help.
will be using #80636 precision hunter eld-x 162 grain bullets
first off i realized i had emailed hornady a couple times for bullet info and received 2 diff responses one states ballistic coef. as .613 the other.308? i surely dont know!
the other question is the dials are only good for a 20 degree temp swing and i need to get it ordered to have in time. but temps are not cold enough for proper chrono reading? 30 degrees would be ideal covered from 10 to 50 i got some readings yest. at 50* what would you do

readings at 77* readings at 51*
2892 2891
2910 2882
2946 2951
 
I bet they're listing G1 and G7, hence the different BCs, because that would be about right for that bullet, in that order.

I'd probably just go with the slower of the two velocities. I'd really be more concerned with getting the elevation right.

If you could shoot your rifle long range and give them the actual comeups it would be better.

Although, anything big enough to require a 7 mag, in my opinion bull elk and large bear, is a pretty [beeep] big target and will leave some room for a slight vertical error.
 
Just a different way of looking at things I suppose


I know nothing about Leupold CDS, but........if (and I don't know if they do or do not) they offered the dials in MOA or Mil, personally I would get that instead of one marked for yardage. This way if you wanted to change loads, or elevations, or move scope to a different rifle you wouldn't have to have another dial made. Again, I don't know if Loopy offer these or not. I understand that some guys would prefer to have yardage and then range and dial versus adding the step of making a drop chart to reference.

Just thinking out loud
 
Originally Posted By: Buster HindendJust a different way of looking at things I suppose


I know nothing about Leupold CDS, but........if (and I don't know if they do or do not) they offered the dials in MOA or Mil, personally I would get that instead of one marked for yardage. This way if you wanted to change loads, or elevations, or move scope to a different rifle you wouldn't have to have another dial made. Again, I don't know if Loopy offer these or not. I understand that some guys would prefer to have yardage and then range and dial versus adding the step of making a drop chart to reference.

Just thinking out loud

Yep...they will cut them just MOA or MIL. You can add or subtract hash marks, styles thereof, etc.

A CDS dial is too situational for me. I hunt in too many different conditions to have them be correct all the time. MILs and Math are...
 
Brad, they will or can come with either Mil or MOA depending which scope and reticle !

I just had one made a couple weeks ago for the 6x6.8 with the yardage, It is one turn with zero stop and goes to about 750 yds for this rifle, i shot it from 100 to 700 yds and it was SPOT ON! (3x9 Mark AR Mod 1 with mil reticle) I try and do things the easy way if possible and for a hunting rifle that shots are not going to be that long.

I use the G1 BCs with a avg of 20 shots at the elevation that is pretty close to what all the areas will be that i will hunt with this rifle and use a Avg temp of 59 degs... I'am going to have 2 more done shortly so we will see i guess.
 
Just to muddy the waters Litz says that particular bullet is .627 G1 BC and the G7 is .321 but I believe Leupold asks for G1 on BC
The scope comes with a MOA turret but while I am sure they could "mark" it in Mil that doesn't seem as a workable solution since the clicks are 1/4 MOA so adjustments would be off????

I have setup about 5 of these custom turrets for friends and each time I have to explain the pro's and Con's just as the folks who have posted above have pointed out correctly. If you understand the systems limitations and are shooting at large game it can work fine.
Main thing is if you get way off of your parameters then be aware and adjust or more prudent is keep shots under 400 yards or so on deer sized critters and your OK



Just looking at your numbers I would agree using 30F if you are in colder climate and I would probably use 2890fps as velocity.
 
moa would be for yds right

venatic even though i have no readings for around 30* would you still use 2890fps or guess it to be a little lower?as 50* is the lowest temp i have?

would it help to put gun in fridgerator? or does the actaul air temp matter even though chrono is only 20 ft away
 
MOA or Mil... nether has really anything to do with yards or meters for that matter.

https://search.yahoo.com/yhs/search?p=Mo...p;hsimp=yhs-002

I wouldn't put my gun in the freezer but you could drop your ammo in a plastic baggie and drop into ice water which will get it close to 32F if that is what you feel will be your temps while hunting.
As far as choreographing ammo the ambient temps are not that important except the ammo itself is colder.
 
I think you may be over-complicating the process. Leupold will want to know your cartridge = 7mm Rem Mag, G7 BC (.315 according to Hornady website), MV = 2900fps, elevation you will be hunting (check on Google Earth or such), and estimated temperature at the time of hunt. You will also have to tell them at what distance you're sighted to hit point of aim in 50 yard increments. If you sight in at say 250yds, that will be where they will set your zero stop. You are then able to use point blank range out to slightly beyond 250yds and then use the CDS turret settings for longer distances. I have found them to be very good as long as the conditions are pretty close to those provided to Leupold. If you change to a different temperature or elevation range you will probably want to have another turret made.
 
trying not to but they do want the fps at approx temp. and its 80* now was my concern as im not familar with this type of calculations and such.
there muzzle velocity stated is a 24" barrel, which fps is close to my readings
 
Originally Posted By: pahntr760Originally Posted By: Buster HindendJust a different way of looking at things I suppose


I know nothing about Leupold CDS, but........if (and I don't know if they do or do not) they offered the dials in MOA or Mil, personally I would get that instead of one marked for yardage. This way if you wanted to change loads, or elevations, or move scope to a different rifle you wouldn't have to have another dial made. Again, I don't know if Loopy offer these or not. I understand that some guys would prefer to have yardage and then range and dial versus adding the step of making a drop chart to reference.

Just thinking out loud

Yep...they will cut them just MOA or MIL. You can add or subtract hash marks, styles thereof, etc.

A CDS dial is too situational for me. I hunt in too many different conditions to have them be correct all the time. MILs and Math are...

I have done the CDS knob built for just one load and I found that is was too limiting as I like to try other bullets. I use nothing but straight MOA or Mil knobs now and that is the only way to go IMO. Ballistic programs are cheap and with practice can be very fast. If you decide to go this route the M1 knobs are the way to go IMO.
 
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