HuntingNut
HuntingNut
   Login or Register
HomeCommunity ForumsPhoto AlbumsRegister
     
 

User Info

Welcome Anonymous


Membership:
Latest: jrbuff8
New Today: 0
New Yesterday: 1
Overall: 12570

People Online:
Members: 0
Visitors: 96
BOT: 3
Total: 99
Who Is Where:
 Visitors:
01: Forums
02: Photo Albums
03: Forums
04: Forums
05: Forums
06: Forums
07: Forums
08: Forums
09: Forums
10: Home
11: Forums
12: Forums
13: Forums
14: Forums
15: Forums
16: Forums
17: Forums
18: Forums
19: Forums
20: Forums
21: Forums
22: Forums
23: Forums
24: Photo Albums
25: Forums
26: Forums
27: Forums
28: Forums
29: Forums
30: Forums
31: Statistics
32: Forums
33: Forums
34: Forums
35: Forums
36: Forums
37: Forums
38: Forums
39: Forums
40: Forums
41: Forums
42: Forums
43: Home
44: Forums
45: Forums
46: Home
47: Forums
48: Forums
49: Forums
50: Home
51: Forums
52: Forums
53: Forums
54: Forums
55: Forums
56: Forums
57: Forums
58: Forums
59: Forums
60: Forums
61: Your Account
62: Forums
63: Forums
64: Forums
65: Forums
66: Forums
67: Forums
68: Forums
69: Forums
70: Home
71: Forums
72: Forums
73: Forums
74: Forums
75: Forums
76: Home
77: Forums
78: Home
79: Forums
80: Forums
81: Forums
82: Forums
83: Photo Albums
84: Forums
85: Forums
86: Your Account
87: Forums
88: Forums
89: Forums
90: Forums
91: Home
92: Forums
93: Forums
94: Forums
95: Forums
96: Forums
  BOT:
01: Forums
02: Home
03: Forums

Staff Online:

No staff members are online!
 

Coppermine Stats
Photo Albums
 Albums: 305
 Pictures: 2356
  · Views: 342902
  · Votes: 1306
  · Comments: 85
 

Support our Advertisers

Range Estimation for veriable power mil dot scope
Discussions related to Guns and Firearms
Go to page 1, 2  Next
View previous topic :: View next topic  
Author Message
tgipe
Rookie Member
Rookie Member


Joined: Jan 06, 2011
Posts: 2

PostPosted: Wed Jan 05, 2011 10:30 pm    Post subject: Range Estimation for veriable power mil dot scope Reply with quote

I'm shooting a rem 770 with a Barska 6-24x50 mil dot scope and know the formulas for range estimation with fixed power ie: Height of Target (meters) x 1000 = Distance (meters) mils
but how do I range a dear at verios power settings. The target takes up less mil dots @ 6x as opposed to 10x or 24x respectively. is there a formula for this?
any takers

AS this post is old I have found the fallowing:
My scope is calibrated @ 10X thus if I am on 6X I use the above Formula then multiply by .6/ if 8X .8/ if 14X 1.4 / if 20X 2/if 24X 2.4

Thanks to all I ended up talking to one of my unit's snipers for the assist who mirrored this forrums answer. the Range finder is a good sugestion. I also got dope sheets for verious ranges Razz


Last edited by tgipe on Sat Jan 14, 2012 1:25 am; edited 1 time in total
Back to top
View user's profile
gelandangan
Super Member
Super Member


Joined: May 07, 2006
Posts: 5817
Location: Sydney Australia

PostPosted: Thu Jan 06, 2011 3:01 am    Post subject: Re: Range Estimation for veriable power mil dot scope Reply with quote

Usually a mildot scope is calibrated to a particular magnification power.
Mine for instance is calibrated to 10X.

I am not sure on your Barska scope but I am sure it is either published on the Berska website or it is written in the instruction sheet.

_________________
A straight line is the shortest distance between two points.
A smile is the shortest distance between two people.

The government I trust .. is my .45-70 Government.

Do - Not try!


gelandangan.weebly.com/
Back to top
View user's profile Visit poster's website
chambered221
Super Member
Super Member


Joined: Aug 17, 2007
Posts: 3455
Location: Lost for good !!!

PostPosted: Thu Jan 06, 2011 7:08 pm    Post subject: Re: Range Estimation for veriable power mil dot scope Reply with quote

To my knowledge 10X is the standard !!!
There should be markings on the power dial for any calibrated power settings.
I know that you can use 20X by cutting your value in half so I would think you could calculate it for any power. Just keep in mind that scopes are not always labeled with actual power.
For example a Leupold VXII 3-9 is actually 3.3-8.6........at long ranges that could be an issue.

_________________
Ask as many people needed, sooner or later your question will be answered the way you want it answered !!!

A free people ought not only to be armed and disciplined, but they should have sufficient arms and ammunition to maintain a status of independence from any who might attempt to abuse them, which would include their own government.
~George Washington
Back to top
View user's profile Photo Gallery
slimjim
Super Member
Super Member


Joined: May 16, 2009
Posts: 7414
Location: Fort Worth TX

PostPosted: Sat Feb 05, 2011 6:41 am    Post subject: Re: Range Estimation for veriable power mil dot scope Reply with quote

I tried practicing with my mil-dot reticle at known ranges with know sized targets. Even at 100 yard increments, I wasn't consistent enough in the estimations at the longer ranges where it mattered. Got a laser range finder instead. They fit in your hand now days and are very reliable.

_________________
"To anger a conservative, lie to him. To anger a liberal, tell him the truth." - Theodore Roosevelt

"The world is a dangerous place to live; not because of the people who are evil, but because of the people who don't do anything about it." - Albert Einstein
Back to top
View user's profile
Grumulkin
Super Member
Super Member


Joined: Apr 16, 2007
Posts: 365
Location: Central Ohio

PostPosted: Sat Feb 05, 2011 7:53 am    Post subject: Re: Range Estimation for veriable power mil dot scope Reply with quote

First of all, 10X isn't necessarily "standard." The scope documentation should tell you what the power setting should be for ranging. Secondly, though not likely in your case, if the scope is a first focal plane scope, you can use it to range on any power.
Back to top
View user's profile Visit poster's website
slimjim
Super Member
Super Member


Joined: May 16, 2009
Posts: 7414
Location: Fort Worth TX

PostPosted: Sat Feb 05, 2011 2:56 pm    Post subject: Re: Range Estimation for veriable power mil dot scope Reply with quote

Below is a write-up for using mil-dots to range on deer.

www.eabco.com/Reports/...tRep01.htm

Even though I stopped trying to estimate accurate range to a deer with a mil-dot reticle, I have used a mil-dot or duplex reticle as a quick estimation for in-range, e.g., put the crosshairs on the chest and shoot. To find this in-range or closer, I place an 18" high sheet of paper at my max range without hold over. As an example, with a .270 zero'd at 250 yards with a Leupold 3.5-10X on 10X, if the deer's chest fills or is larger than the distance from the tip of the bottom duplex to the top, the deer is in range (300 yards or closer). If the deer's chest is smaller, I need to take a laser range. This technique can be used with a mil-dot also with the magnificantion you expect to hunt with as a default seting.

_________________
"To anger a conservative, lie to him. To anger a liberal, tell him the truth." - Theodore Roosevelt

"The world is a dangerous place to live; not because of the people who are evil, but because of the people who don't do anything about it." - Albert Einstein
Back to top
View user's profile
RePete
Super Member
Super Member


Joined: Aug 15, 2005
Posts: 798

PostPosted: Wed Feb 09, 2011 8:16 am    Post subject: Re: Range Estimation for veriable power mil dot scope Reply with quote

The scope reticle is on the second focal plane and as you adjust the magnification the reticle grows and shrinks, therefore the ranging is done at 10x or what the manufacturer determines. Read the manual.

If the reticle is on the first focal plane, like my S&B, then you can range at any magnification.

_________________
Proud member of the WTFDTSG Club.

Stercus Accidit = Sh*t Happens in Latin.

Nice try = You Suck spelled different.
Back to top
View user's profile
stovepipe
Super Member
Super Member


Joined: Sep 25, 2008
Posts: 4877
Location: Pine, Az.

PostPosted: Sun Feb 27, 2011 1:14 am    Post subject: Re: Range Estimation for veriable power mil dot scope Reply with quote

if the reticle is on the second plane youll need to find the calibration power if it is not marked on the scope. set a target @ 100y, zero it, then fire for effect @ different powers till you get the propper come up for one dot and mark the power and paralax setings w/ a dot of white nail polish. then you can double or half your ranging based on same if the powers are correct as labled on the ring.
Back to top
View user's profile
slimjim
Super Member
Super Member


Joined: May 16, 2009
Posts: 7414
Location: Fort Worth TX

PostPosted: Sun Feb 27, 2011 5:28 pm    Post subject: Re: Range Estimation for veriable power mil dot scope Reply with quote

Not sure you have to shoot any rounds, stovy. Just set-up a target with markings equivalent to MOA at that range and dial-in the power until they match. E.g., 18 inches = 5 mils at 100 yards.

_________________
"To anger a conservative, lie to him. To anger a liberal, tell him the truth." - Theodore Roosevelt

"The world is a dangerous place to live; not because of the people who are evil, but because of the people who don't do anything about it." - Albert Einstein
Back to top
View user's profile
stovepipe
Super Member
Super Member


Joined: Sep 25, 2008
Posts: 4877
Location: Pine, Az.

PostPosted: Thu Mar 03, 2011 3:17 pm    Post subject: Re: Range Estimation for veriable power mil dot scope Reply with quote

i never thought of that Embarassed , good thinkin! i like to send rounds to confirm my settings. gives me an excuse to hear ol' El Kabong speak. Very Happy
Back to top
View user's profile
slimjim
Super Member
Super Member


Joined: May 16, 2009
Posts: 7414
Location: Fort Worth TX

PostPosted: Thu Mar 03, 2011 4:51 pm    Post subject: Re: Range Estimation for veriable power mil dot scope Reply with quote

watch that shoulder!

_________________
"To anger a conservative, lie to him. To anger a liberal, tell him the truth." - Theodore Roosevelt

"The world is a dangerous place to live; not because of the people who are evil, but because of the people who don't do anything about it." - Albert Einstein
Back to top
View user's profile
stovepipe
Super Member
Super Member


Joined: Sep 25, 2008
Posts: 4877
Location: Pine, Az.

PostPosted: Thu Mar 03, 2011 7:32 pm    Post subject: Re: Range Estimation for veriable power mil dot scope Reply with quote

copy. i def aint anywhere near any loaded firearms right now or for the forseeable future. too much pain and drugs. i ought to know better than to be spouting technical stuff in this condition..... Mad Laughing
Back to top
View user's profile
glockman55
Super Member
Super Member


Joined: Dec 12, 2005
Posts: 831
Location: Michigan

PostPosted: Thu Mar 10, 2011 4:02 am    Post subject: Re: Range Estimation for veriable power mil dot scope Reply with quote

Good info guys...I still agree on the Range Finder too.. Handy tool to have along.

_________________
Are you boys gonna pull them pistols or whistle dixie?
Back to top
View user's profile Yahoo Messenger Photo Gallery
eaglesnester
Rookie Member
Rookie Member


Joined: Jan 22, 2008
Posts: 22
Location: Northern Interior B.C. Canada

PostPosted: Sun Mar 13, 2011 7:21 am    Post subject: Re: Range Estimation for veriable power mil dot scope Reply with quote

Unless your scope is first focal plane, you would probably do your milling with the scope set at full power. FIrst focal plane scopes are very exspensive, I dont like em because the cross hairs get bigger as you turn up the power. It works like this. In variable-magnification optics, the magnification setting for the use of the Mil Dot or TMR reticle is determined by whether the reticle is in the first or second focal plane. The easiest way to determine if the reticle is in the first focal plane is to view the reticle through the scope while changing the magnification setting. If the size of the reticle appears to change as the magnification setting is changed, the reticle is in the first focal plane, No specific magnification setting is required to obtain the proper subtension to yield accurate range estimating results. If your reticle does not change with increase in magnification then your reticle is in second focal plane and you would likely do your milling at full power setting. I have two Leupold MK-IV tactical TMR 6.5X20-50MM scopes that are in second focal plane and I love them. One is on my 338/378 and the other is on my 300 Weaterby mag. I use the Near mounting systems on both rifles and they will shoot the wings off a fly at 100 meters.
Back to top
View user's profile
slimjim
Super Member
Super Member


Joined: May 16, 2009
Posts: 7414
Location: Fort Worth TX

PostPosted: Sun Mar 13, 2011 11:57 am    Post subject: Re: Range Estimation for veriable power mil dot scope Reply with quote

Many high magnification variable-power scopes have their "mil-setting" below maximum magnification. My 2.5 to 16 power Bushnell is set at 10x. A fixed 10x was the standard for snipers for many years. An advantage of not having the mil-setting at high powers is to avoid the affects of heat shimmer during hot conditions. A second advantage occurs when you use your mil-dot for ballistic drop compensation and you have a flat shooting rifle. You can adjust magnification above the mil-setting to tune to the flatter trajectory. My .270 with 130gr GMX and scope set on 11.5x gives me 100 yd zero, 300 yards at the first mil-dot, 400 at the second dot, 500 yards at the 3th, and 600 yards POI at the 4th mil-dot.

_________________
"To anger a conservative, lie to him. To anger a liberal, tell him the truth." - Theodore Roosevelt

"The world is a dangerous place to live; not because of the people who are evil, but because of the people who don't do anything about it." - Albert Einstein
Back to top
View user's profile
Display posts from previous:   
Post new topic   Reply to topic   Printer Friendly Page    Forum Index » Gun & Firearm Discussions
Page 1 of 2
All times are GMT - 7 Hours
Go to page 1, 2  Next



Jump to:  


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum


Advertisements
 


Valid CSS! Valid HTML 4.01!
Click to check if this page is realy HTML 4.01 compliant for speed :)

All logos and trademarks in this site are property of HuntingNut.com.
The comments are property of their posters, all the rest © 2011 by HuntingNut.com
Interactive software released under GNU GPL, Code Credits, Privacy Policy

.: Upgraded to DragonFly 9.2 by Dizfunkshunal :.