Mildot scope, cartridge match
- Thread starter arch1965
- Start date
Max Owner
CGN Ultra frequent flyer
I would suggest you find out what the U.S. snipers are using. I would suspect if there is a conection with Mil Dots, it would be that round.
However, I think that Mil Dots are just for range estimation. You have to know the ballistics of your round. And adjust scope accordingly......
However, I think that Mil Dots are just for range estimation. You have to know the ballistics of your round. And adjust scope accordingly......
MIL Dots do not correlate to any round. Their primary purpose is range estimation. However with a detailed trajectory chart you can figure out what range each dot corresponds to.
- Location
- In the clock tower!!
Mil-Dots are simply used to estimate range, windage, and holdovers.
You need to know the trajectory of the round you are shooting with including full and half values with wind. Once you have this figured using mil-dots requires simple math. With experience you'll get past the math.
With most high end sniper / tactical scopes you can purchase a bullet drop compensator or BDC. This will be calibrated to a specific round for elevation and will be set out in meters or yards, depending on how you order it. For instance, with the 308, Leupold makes a BDC for such rounds as a 168gr and 175gr round. If you look at the spec it will show the round and muzzle velocity. Thus the knob is simply calibrated to the trajectory of that round and that speed. They are nice, however, you need to stick to that round of you elevation goes out the window.
Good luck.
You need to know the trajectory of the round you are shooting with including full and half values with wind. Once you have this figured using mil-dots requires simple math. With experience you'll get past the math.
With most high end sniper / tactical scopes you can purchase a bullet drop compensator or BDC. This will be calibrated to a specific round for elevation and will be set out in meters or yards, depending on how you order it. For instance, with the 308, Leupold makes a BDC for such rounds as a 168gr and 175gr round. If you look at the spec it will show the round and muzzle velocity. Thus the knob is simply calibrated to the trajectory of that round and that speed. They are nice, however, you need to stick to that round of you elevation goes out the window.
Good luck.
Keebler750
CGN Ultra frequent flyer
- Location
- Alberta!!!
The guys above are correct. Mil Dot is virtually useless for elevation setting without a ton of calculating, and there will be no consistency to it. Each mil above cross hair center will mean something totally different compared to your cartridges trajectory.
Use it for ranging!
Bullet drop compensators are closer to what you are talking about BUT....
In my opinion, bullet drop compensators can't be as accurate as knowing your numbers and dialing it in MOA. Why? because bullet drop, even for the same cartridges will not be the same for all condition you shoot in. If you zero in +3C weather and shoot in +30C, your point of impact might be high by 2 inches or more (at a hundred yards) from where you expected it to hit!!!! (...just rough figures)
"Knowing your numbers" means knowing your muzzle velocities at different temperatures (and realizing the relationship between these...including things like the fact that heated cartridges sitting in a hot chamber from the last shot, will print higher on the target because they are faster)
Also wind and environmental conditions such as heavier air density affect your trajectories and these are applied as corrections to the basic calculations.
This scientific gibberish is the difference between a hit and a miss. It's knowledge that seperates the good shooters and the 'bad'......not just a steady hold!!!
Where that sucker is headed after you pull the trigger is all math.
I love the challenge of it!!!
Use it for ranging!
Bullet drop compensators are closer to what you are talking about BUT....
In my opinion, bullet drop compensators can't be as accurate as knowing your numbers and dialing it in MOA. Why? because bullet drop, even for the same cartridges will not be the same for all condition you shoot in. If you zero in +3C weather and shoot in +30C, your point of impact might be high by 2 inches or more (at a hundred yards) from where you expected it to hit!!!! (...just rough figures)
"Knowing your numbers" means knowing your muzzle velocities at different temperatures (and realizing the relationship between these...including things like the fact that heated cartridges sitting in a hot chamber from the last shot, will print higher on the target because they are faster)
Also wind and environmental conditions such as heavier air density affect your trajectories and these are applied as corrections to the basic calculations.
This scientific gibberish is the difference between a hit and a miss. It's knowledge that seperates the good shooters and the 'bad'......not just a steady hold!!!
Where that sucker is headed after you pull the trigger is all math.
I love the challenge of it!!!
The trick is to work up a nice load, then run off 1000 rounds or so. Zero the scope crosshairs at a suitable distance, then ladder up and down on your mildots. An external ballistics graph for the bullet that you are using should allow you to correlate these offsets to points of impact. Set targets at these rqanges and test to ensure the math was right. Simple. Oh, you also need to be real good at either estimating or measuring ranges before this works. Use the results to draw up a range card and laminate it and attach to the butt of your rifle.
Kodiak99317
CGN frequent flyer
- Location
- Saskatchewan, Canada
Altitude makes more of a difference than most of the variables in ballistic programs so you have to take this into account too. Bang on at 1800 yds in Sask at 1704' is 10 MOA or about 15' high in Alberta at 4200'. Think about this one as you are hiking up the mountain 4-5000' up from the valley floor and taking an up hill shot!
mildot scope cartridge match
there is not a ton of calculations to do.
one MIL is 1 / 1000 = 3.44 MOA
1 MOA = 1.047 inch at 100 yds say 1.05, 2.10 inch at 200 yds and so on.
once you get your traj. in inch you can translate it in MOA and MILS easily.
If you're confused use the JBM ballistic program (google)
all you need is the bullet cal, weight, BC and mvo (muzzle velocity)
you also need the bore to sight line distance (put 1.5, 1.75 or 2.0 which is most scope install setings. It won't make much difference)
example .308 155 gr at 2800 fps (SMK) BC = 0.450 (roughly off the top of my head) you even have links to bullet brands and they give you the BCs most interesting bullets to me are the Lapua Scenars, Berger VLDs, Sierra SMKs and Hornady Amax.
put a max range, say 1000 yds and 50 or 100 yds increment, set the zero at 100 yds and ask for trajectory in inch and MOA or MOA and MILS you can even put a crosswind and get the drift in both units too.
as easy as 2 + 2 = 4
luck
there is not a ton of calculations to do.
one MIL is 1 / 1000 = 3.44 MOA
1 MOA = 1.047 inch at 100 yds say 1.05, 2.10 inch at 200 yds and so on.
once you get your traj. in inch you can translate it in MOA and MILS easily.
If you're confused use the JBM ballistic program (google)
all you need is the bullet cal, weight, BC and mvo (muzzle velocity)
you also need the bore to sight line distance (put 1.5, 1.75 or 2.0 which is most scope install setings. It won't make much difference)
example .308 155 gr at 2800 fps (SMK) BC = 0.450 (roughly off the top of my head) you even have links to bullet brands and they give you the BCs most interesting bullets to me are the Lapua Scenars, Berger VLDs, Sierra SMKs and Hornady Amax.
put a max range, say 1000 yds and 50 or 100 yds increment, set the zero at 100 yds and ask for trajectory in inch and MOA or MOA and MILS you can even put a crosswind and get the drift in both units too.
as easy as 2 + 2 = 4
luck
Or you could cheat and get something like this.
http://www.burrisoptics.com/laserscope.html
Or really cheat and get this one. Just hold dead on at whatever known distance.
http://www.elcansportingoptics.com/home.php
http://www.burrisoptics.com/laserscope.html
Or really cheat and get this one. Just hold dead on at whatever known distance.
http://www.elcansportingoptics.com/home.php
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I tried a multi thousand dollar Zeiss Victory laser scope and it sucked!
It wouldn't register targets beyond 600 yds.
I'm going for the Swavorsky LRF rated 1500yds
I tried a friend's and it registered silos at 19XX yds and a barn at 18XX yards.
I got a deal at 810$ US + shp.
It wouldn't register targets beyond 600 yds.
I'm going for the Swavorsky LRF rated 1500yds
I tried a friend's and it registered silos at 19XX yds and a barn at 18XX yards.
I got a deal at 810$ US + shp.
