Reloader's Nest Forum
Reloader's Nest Forum
Home | Profile | Active Topics | Members | Private Messages | Search | FAQ
 All Forums
 Reloading General
 General forum
 Using the elevation turret properly

Note: You must be registered in order to post a reply.

Screensize:
UserName:
Password:
Format Mode:
Format: BoldItalicizedUnderlineStrikethrough Align LeftCenteredAlign Right Horizontal Rule Insert HyperlinkInsert EmailInsert Image Insert CodeInsert QuoteInsert List
   
Message:

* HTML is OFF
* Forum Code is ON
Smilies
Smile [:)] Big Smile [:D] Cool [8D] Blush [:I]
Tongue [:P] Evil [):] Wink [;)] Clown [:o)]
Black Eye [B)] Eight Ball [8] Frown [:(] Shy [8)]
Shocked [:0] Angry [:(!] Dead [xx(] Sleepy [|)]
Kisses [:X] Approve [^] Disapprove [V] Question [?]

 
   

T O P I C    R E V I E W
Gw hunter Posted - Jul 25 2017 : 17:02:37
I finally swapped out my 35 year old 3-9x40 Leupold for a Vortex Viper HS in 4-16x44. Now I'm trying to understand the correct use of the elevation turret. So for example.... (using Barnes manual #4 with a B.C. of .390) My muzzle velocity is 3300'/sec. If my zero is at 100 yds, then at 400 yds my P.O.I. is 21.20" low, basically 21"... To have my P.O.I. dead on at 400 do I raised the elevation 84 clicks (1/4" per click)? I'm confused because if my zero is 300 yds then I would be 3" high at 100 and 9" low at 400 yds. Do I then raise the elevation 36 clicks from there? The numbers don't make sense to me when you compare the different zero points. Any input would be appreciated. Thanks
9   L A T E S T    R E P L I E S    (Newest First)
Rapier Posted - Aug 08 2017 : 09:36:50
The very first error many shooters, that have little or no experience with long distance shooting make is assuming the scope elevation data as given on the box or spec sheet from the factory is accurate data. 99.99% of the time those numbers are pure estimates. If you want to shoot varying distances and longer distances, with heaven forbid, using the scope adjustments knobs, first determine what the actual adjustments are for each knob, elevation and windage knobs both. Remember to take the backlash out and to always return to zero when you stop shooting for the day.
Ed
Zero333 Posted - Jul 26 2017 : 20:13:51
100 yard zero, 0.39 bc, 3,300 fps, 400 yard dope =

5 moa = 20 clicks on scope with 1/4 moa clicks.... or

1.5 milliradians (Mrads, Mils) = 15 clicks on a scope with Mrad turrets.




mtmuley Posted - Jul 26 2017 : 08:06:28
Zero your rifle at whatever range you choose, then use a ballistics program to print a chart for the adjustments in MOA at furthe yardages. mtmuley
Gw hunter Posted - Jul 26 2017 : 03:00:59
Yes it's MOA. I've got it now. I'm aware that MOA is linear, I guess I just had a senior moment while looking at the ballistic data of different zero ranges and how they compare. I do chrony all of my loads so I use book data as just a reference. I
mtmuley Posted - Jul 25 2017 : 19:44:00
I'm assuming your turret is marked in MOA? mtmuley
caveman0101 Posted - Jul 25 2017 : 18:33:45
Do yourself a favor and once you know what bullet your going to shoot and the muzzle velocity, get a custom turret made. They only cost about $85 dollars then it's just range, turn turret to correct yardage and bang. But don't use book info actually shot your gun through chrony. And another thing there are several great hunting bullets with much better B.C. It will save a lot of clicks at long range.
Shastaboat Posted - Jul 25 2017 : 18:25:54
quote:
Originally posted by Onondaga

Gw hunter

NO, You are wrong. The click equals 1/4' only @ 100 yards and the effect is linear. At 200 yards a click equals 1/2 inches and at 400 yards a click equals 1 inch. Likewise at 50 yards a click equals 1/8" and at 25 yards a click equals 1/16 inch. This is simple linear mathematics.

Gary





Good post Gary.
Gw hunter Posted - Jul 25 2017 : 17:54:09
Just realized the disconnect... 1/4" per click at 100 equals 1" at 400... the numbers do make sense now.
Onondaga Posted - Jul 25 2017 : 17:52:48
Gw hunter

NO, You are wrong. The click equals 1/4' only @ 100 yards and the effect is linear. At 200 yards a click equals 1/2 inches and at 400 yards a click equals 1 inch. Likewise at 50 yards a click equals 1/8" and at 25 yards a click equals 1/16 inch. This is simple linear mathematics.

Gary

Reloader's Nest Forum © 2016 ReloadersNest Go To Top Of Page
This page was generated in 0.04 seconds. Powered By: Snitz Forums 2000 Version 3.4.06