Scope Readjustment?

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doc540 Member Joined Dec 2008 Posts 1410 EE 100% (16) TX, USA	Posted: 7/30/2019 8:17:38 PM EDT Basic Question Scope (with zeroed target turrets) is currently sighted in at 600yds. .308, 165gr, @2600fps Adjustments are 1 click = .75" To adjust down to 100 and/or 200yds - how many clicks to get me somewhere on the 24" x 36" target backer?
	Due Process

Reorx Joined Aug 2008 Posts 3014 EE 0% (0) FL, USA	Posted: 7/30/2019 8:36:26 PM EDT [Last Edit: Reorx] [#1] "Clicks" are typically defined in terms of angular units (like MOA or MILs) not linear units (like inches). Do you know the angular units for a "click" on the optic in question? Something like 1 click = 1/4 moa or 0.1 mil are common...

gsc0527 Joined Nov 2001 Posts 2737 EE 100% (5) MT, USA	Posted: 7/30/2019 8:59:51 PM EDT [#2] At 600 yards your bullet drops about 119” from the bore, at 100 yards that’s 2.5”

shortround Member Joined Nov 2000 Posts 1442 EE 100% (3) MI, USA	Posted: 7/30/2019 9:09:37 PM EDT [Last Edit: shortround] [#3] 1 Click = .75" at what range? What is the ballistic coefficient of the bullet you are shooting? Lots of variables. Just punching in some numbers, you need to come down 16 MOA. So if your scope does move in .75" increments at 100 yds, you need to come down 21-22 clicks.
	If you're going to fight, fight like you're the third monkey on the ramp to Noah's ark and brother, IT'S STARTING TO RAIN!

Rob01

Member

Joined Feb 2002
Posts 9223
EE 100% (19)

NC, USA

Posted: 7/30/2019 9:21:00 PM EDT

[#4]

Originally Posted By doc540:
Basic Question

Scope (with zeroed target turrets) is currently sighted in at 600yds.

.308, 165gr, @2600fps

Adjustments are 1 click = .75"

To adjust down to 100 and/or 200yds - how many clicks to get me somewhere on the 24" x 36" target backer?

View Quote

Why sighted in at 600 yards?

Second, stop thinking clicks and linear inches. What scope do you have?

http://www.teamblaster.net

doc540

Member

Joined Dec 2008
Posts 1411
EE 100% (16)

TX, USA

Posted: 7/30/2019 10:34:49 PM EDT

[Last Edit: doc540] [#5]

Quote History

Originally Posted By shortround:
1 Click = .75" at what range?

What is the ballistic coefficient of the bullet you are shooting?

Lots of variables.

Just punching in some numbers, you need to come down 16 MOA. So if your scope does move in .75" increments at 100 yds, you need to come down 21-22 clicks.

View Quote

Thanks

BC is .53

IIRC (and that's the problem) 21-25 is about what I needed to get it from 100yds onto the big 600yd backer.

I should've kept more precise notes when I first started shooting out to 600yds and tested multiple weight bullets.

I guess I can always zero the turret and start counting them down at the 100yd line.

Thanks again

Due Process

Rob01 Member Joined Feb 2002 Posts 9224 EE 100% (19) NC, USA	Posted: 7/31/2019 7:57:41 AM EDT [#6] Doc you need to stop thinking in clicks and inches. You are making your life much harder. Dialing down from 600 to 100 is a very simple thing. Do it many times at matches but you are making it very complicated. Zero at 100. Then dial to where you need to be and when done dial back down to your zero.
	http://www.teamblaster.net

Ironmaker I used to make 4140 & 4150, now I make Cu alloys. Joined Sep 2004 Posts 7587 EE 100% (6) OH, USA	Posted: 7/31/2019 8:17:40 AM EDT [#7] Download a simple ballistics calculator like BulletDrop+ onto your phone and plug in your numbers. As others have said, stop thinking about clicks in inches.
	Never follow anyone shorter than you; they can walk under things that you can't.

doc540 Member Joined Dec 2008 Posts 1416 EE 100% (16) TX, USA	Posted: 8/1/2019 12:34:20 PM EDT [#8] thanks for all the info stayed at 600 this morning used the opportunity to twist the knobs a bit good learning experience sure is fun
	Due Process

AKSnowRider

Member

Joined Jul 2014
Posts 21790
EE 0% (0)

AK, USA

Posted: 8/1/2019 3:24:02 PM EDT

[#9]

Quote History

Originally Posted By doc540:
thanks for all the info

stayed at 600 this morning

used the opportunity to twist the knobs a bit

good learning experience

sure is fun

https://i.imgur.com/idxUNgq.jpg

View Quote

OP, just put your load/weather conditions into a ballistic calculator using a 100 yard zero..than dial down that number of clicks and hit the 100 yard line and fire away..you should be right on the money if your dope is good, and if not it should be on paper and you can make the corrections...Then go back to the 600 and work your dial and correct your dope as needed....

doc540

Member

Joined Dec 2008
Posts 1422
EE 100% (16)

TX, USA

Posted: 8/8/2019 12:18:45 PM EDT

[Last Edit: doc540] [#10]

Haven't moved back down to 200/100 yet. (Having too much fun at 600.)

BUT I've been reloading and shooting different weight bullets and successfully moving point of aim with the Mueller turrets.

Yesterday I shot 165gr GameChangers and this morning shot 150gr MK's. The adjustments were easy and right on the money.

Info went in my book.

Thanks to all who've offered help.

Due Process

Klaatu_barada_nikto Member Joined Nov 2018 Posts 752 EE 100% (3) WA, USA	Posted: 9/3/2019 7:26:57 PM EDT [Last Edit: Klaatu_barada_nikto] [#11] I use an app, strelok,. Was free when I got it, I think it might cost$ now. Gives all the info you need.

Scope Readjustment?

Precision Rifles » Marksmanship

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