RANGE ELEVATIONS

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whippy
Posts: 46
Joined: Sun Oct 14, 2007 3:46 pm
Location: nsw south coast

RANGE ELEVATIONS

#1 Postby whippy » Mon Oct 15, 2007 9:09 am

g'day, i would like some info on range elevations. i will be using a .223 cal rifle. the ammo i will be using is lapua cases with 22.5 gns ar2206 pushing 80 gn sierra projectiles at approx. 2700 ft per sec. if i am zero at 100 mts how many minutes elevation at 300.
the same for from 300 to 400
400 to 500
500 to 600
600 to 700
700 to 800

thank you.
SHOOT WELL & SHOOT TRUE

Guest

#2 Postby Guest » Mon Oct 15, 2007 11:53 am

Whippy,
You need more than 2700 F/S to get to 800m accurately.
I would suggest 2850 Min. and even that would be light on for 1000yds.
Barry

whippy
Posts: 46
Joined: Sun Oct 14, 2007 3:46 pm
Location: nsw south coast

thanks barry

#3 Postby whippy » Mon Oct 15, 2007 1:07 pm

thanks for your advice. i really appreciate it as i am new to long range shooting. cheers
SHOOT WELL & SHOOT TRUE

Barry T
Posts: 100
Joined: Mon Aug 20, 2007 9:25 pm
Location: BUNDABERG

#4 Postby Barry T » Mon Oct 15, 2007 3:18 pm

Hello :D whippy, this might help, i used a tasco world class 24 power target scope with 1/8 clicks but it is for my ar 2206 load of 24.1 grains with a serria 69 hpbt load at 60.1 o.a.l. 100 yards to 300 yards 28 - 32 clicks. once zero at 300 yards.

300 = zero.
300 - 400 . 25 clicks up.
300 - 500 . 50clicks up.
300 - 600 . 80 clicks up.
300 - 700 . 116 clicks up.
300 - 800 . 159 clicks up.

i hope this will give you some idea.

cheers from barry. 8)

whippy
Posts: 46
Joined: Sun Oct 14, 2007 3:46 pm
Location: nsw south coast

thanks barry

#5 Postby whippy » Mon Oct 15, 2007 4:07 pm

mate, that will be of great help. thanks very much. happy shooting.
SHOOT WELL & SHOOT TRUE

Gadget
Posts: 171
Joined: Thu Sep 13, 2007 9:40 pm
Location: Nowra
Contact:

#6 Postby Gadget » Mon Oct 15, 2007 5:41 pm

Hi ,this should answer 2 questions, I find a 100mt 0 a lot better for me as I can test and develop loads on our 100 mtr range twice a week when req.

.223 1:8 twist 23.8g 2206h 80g SMK's 0.005 off lands

100 = 0
200 = 2.0 M.O.A
300 = 4.5
400 = 8.0
500 = 11.0
600 = 15.2
700 = 20.0
800 = 27.0

This should put you on paper or better every time.
Just for the hell of it the next list was for 2206 powder 22.5g 80g SMK's same gun.
100=0
200=2
300=5
400=9
500=13
600=18
700=23
800=30

Graham.

pjifl
Posts: 586
Joined: Fri Jun 17, 2005 12:15 pm
Location: Innisfail, Far North QLD.

#7 Postby pjifl » Mon Oct 15, 2007 9:13 pm

I totally agree with Barry Davies that 2700 f/s with 80 gr 223's is not enough except at shorter ranges - and even there you are putting yourself at a disadvantage.

You should be able to get over 2800 with careful loading and choice of powders. I use 25 gr of 2208 which gives about 2840 f/s but can use more. I can shoot at about 2950 but case life goes down - 2900 is however possible. Thats in a 28 in barrel but all barrels are different - some are tighter than others.

As to elevation tables, there are many downloadable ballistics programs which compute fall values. If you cannot find one, a program of mine has an external ballistics calculator in it under Misc - trajectory comparisons.

It was written mainly to do other things but simply ignore them and go straight to the menu item MISC/Traj Comparison.

The elevation calculator works as well as most. No guarantee - but its free. Its good enough that I use it a lot.

Download from

http://www.users.bigpond.com/pjifl/GroupZ.zip


If anyone does download it, unzip, then place it on drive C - ie - the
directory to be C:\GroupZ. Then simply start by running GroupZ.exe

Peter Smith.

Tony Q
Posts: 1044
Joined: Mon Jun 20, 2005 8:04 pm
Location: Adelaide (MBRC)

#8 Postby Tony Q » Tue Oct 16, 2007 10:15 am

Id like to point out too that its best to ‘check’ your scopes calibration when your on the zeroing range. This is quite easy to do.

Shoot a shot on your 100yard zero then wind, say, 3moa up and shoot again. Then measure the distance between the two holes. If the distance is 3 inches (76mm) then your MOA calibration is close enough. Then try using several MOA values, such as 10moa or 20moa, then wind back to zero and repeat to see if the scope is repeatable. If you did this on a 300yard zero (and at 300yards) then the distance between the the 2 shots would be 9 inches (for a 3 moa varience) You can also use this for checking windage too ... but using the wind (L/R) turret :lol:

Note: of your doing this at 100 Meters then you need to add 10%, i.e. 3 MOA = 3.3 inches (84mm) and for 300 Meters 3 MOA = 9.9 inches (251mm)

Once, and this was with a middle priced $750 scope, we had an issue where the MOA information we were issuing to the shooter was seeing great error in shot placement. On closer inspection we found that 1 MOA on his turret (4 clicks=1moa) were actually producing the equivalent of 1.3 moa, so 10 moa on his dial actually gave 13moa in reality on target. In the end as he did not want to send it back, we produced a modified drop chart for him, that in essence was our own drop charts divided by 1.3, and that worked very well. After a year he purchased a NF BR scope.


Barry

I think its also worth while stating that, and some may disagree, it is always best to talk in whole MOA rather than clicks … ie 159 clicks = 20moa (19moa and 7 clicks to be more precise) when using a 8 click=1moa turret. If your turret has whole moa numerals on it and a full revolution is 10, then a 20moa elevation change is simply 2 full rotations of the turret nob. If a full revolution is 7moa then it would be 2 full rotations + an additional 6moa.

Regardless of turret type (1/8 or 1/4) MOA is MOA, so a 20moa elevation setting is simply that .. 20moa (160clicks for 1/8 and 80clicks for 1/4)

This is different to saying to someone 'come up 5 clicks' or take 4 clicks off wind' when your coaching .. :D in that scenario 'clicks' is better :D

Always talk, and think, in MOA if you can :D

And … ALWAYS wind your scope back to ZERO, or by using the horizontal stradia lines at the bottom of the turret, make sure you know where your ZERO is, that way you will never have a problem.


Tony.
MBRC F-Class standard ... and proud of it!

Tony Q
Posts: 1044
Joined: Mon Jun 20, 2005 8:04 pm
Location: Adelaide (MBRC)

#9 Postby Tony Q » Tue Oct 16, 2007 11:21 am

Barry

Just to give you some additional info … your settings, as you write them, for your Rifle/Scope in clicks, MOA for imperial ranges and (adding 10%) MOA for metric ranges.

300 = zero.
300 - 400 . 25 clicks up. (3.1 MOA for yards) (3.5 MOA for meters)
300 - 500 . 50clicks up. (6.25 MOA for yards) (7.0 MOA for meters)
300 - 600 . 80 clicks up. (10.0 MOA for yards) (11.0 MOA for meters)
300 - 700 . 116 clicks up. (14.5 MOA for yards) 16.0 MOA for meters)
300 - 800 . 159 clicks up. (20.0 MOA for yards) (22.0 MOA for meters)

Note: The 800 Meter MOA setting may not be enough for the lighter 69gn pills your using.

Tony.
MBRC F-Class standard ... and proud of it!

Barry T
Posts: 100
Joined: Mon Aug 20, 2007 9:25 pm
Location: BUNDABERG

#10 Postby Barry T » Tue Oct 16, 2007 8:18 pm

Hello :D Tony, thank you i will print it to keep in my gun case.old habits are hard to break, i thought for a new shooter it would be easy to do clicks for them.it's only my opinon :idea: .
a friend of mine used my 69 load in a 1 in 9 twist savage on sunday just gone ,on the 800 yard shoot .he gave us a run for awhile :oops: .
cheers from barry 8)

Tony Q
Posts: 1044
Joined: Mon Jun 20, 2005 8:04 pm
Location: Adelaide (MBRC)

#11 Postby Tony Q » Wed Oct 17, 2007 8:55 pm

I apologize Barry as I now see where your coming from, and your right, we all have our own little ways of doing things and in this case neither way is wrong. :D
MBRC F-Class standard ... and proud of it!

Barry T
Posts: 100
Joined: Mon Aug 20, 2007 9:25 pm
Location: BUNDABERG

#12 Postby Barry T » Wed Oct 17, 2007 9:44 pm

Hello :D Tony, no need to apologize :lol: you did not step on my toes.i am starting to learn to wear steel cap boots on the forum :lol: :lol: :lol: :lol: . it alright,i only put it in easy terms for the new guy to get him started. at our local range i have four family members shooting their and three of us use clicks , but i do see your point, especialy when rushed(no time to count) in a competion. thanks :) again tony.
cheers from barry t.


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