Rifle Scopes So I have 156 1/10 mil clicks of adjustment .

[1911pro]

I just checked my new Weaver tactical 4-20 and came up with 156 clicks of elevation. Checking my 3rd grade math skills.
156 1/10 = 15.6 mils of total elevation adjustment. If I am lucky and the zero at 100 yards does not take much out of the top any idea how far out it would take me on a 26inch .308 0 moa base before running out. All the info I find seems to be in MOA. Thanks

 

[z71rat]

Re: So I have 156 1/10 mil clicks of adjustment .

JBM Ballistics calculator will allow you to input any of the specifications of your rifle to get you the information you are wanting. Here is the link:

http://www.jbmballistics.com/ballistics/calculators/calculators.shtml


DK

 

[z71rat]

Re: So I have 156 1/10 mil clicks of adjustment .

Just from some rough plugin numbers, you should be able (your numbers may vary) to get out to around 1150 without killing your scope's erector.

DK

 

[BoilerUP]

Re: So I have 156 1/10 mil clicks of adjustment .

3.4 MOA = 1.0 mil

If you zero it smack in the middle of your elevation, you'd have 7.8mil of up adjustment left, which according to Shooter would get you to 800yd with a 175 SMK @ 2700fps (7.2 mil, assuming sea level/standard atmosphere).

 

[1911pro]

Re: So I have 156 1/10 mil clicks of adjustment .

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: z71rat</div><div class="ubbcode-body">Just from some rough plugin numbers, you should be able (your numbers may vary) to get out to around 1150 without killing your scope's erector.

DK </div></div>
Thanks. I will check out the link. I saw a chart that figured 10.5 mil for 175gr at 2650fps for 1000 yards. If I split the 15.6 and have 7.8 mil would it only bring me to about 850 yards before having to hold over? Less if I have to use up some to zero at 100 yards? Maybe I am thinking wrong.

 

[1911pro]

Re: So I have 156 1/10 mil clicks of adjustment .

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: BoilerUP</div><div class="ubbcode-body">3.4 MOA = 1.0 mil

If you zero it smack in the middle of your elevation, you'd have 7.8mil of up adjustment left, which according to Shooter would get you to 800yd with a 175 SMK @ 2700fps (7.2 mil, assuming sea level/standard atmosphere). </div></div>
Just saw your post after I had already responded thinking the same thing. Thanks. Close to 800 yards would make me happy on the 0moa base. Hopefully it will give me the adjustment.

 

[BCP]

Re: So I have 156 1/10 mil clicks of adjustment .

If you have 15.6 TOTAL top to bottom you will run out of adjustment a little after 600 would be my guess. To dial to 1k you'll probably need a 20MOA base.

 

[1911pro]

Re: So I have 156 1/10 mil clicks of adjustment .

So you figure that I may have about 5 mil of adjustment after 100 yard zero? I am hoping for better than that, but you may be right. I am worried about getting a 100 yard zero even with a 15 moa base. Most of my shooting will be no more than 800 yard max. Is there room to holdover and make 1000 yards?

 

[BCP]

Re: So I have 156 1/10 mil clicks of adjustment .

You would probably need roughly 4mils of holdover for 1k yards so I don't see why you couldn't hold over.

edit: I'm guessing after zero you'll have about 6.5-7mil of up and need 10.5-11.5 for 1k depending on load.

 

[Grump]

Re: So I have 156 1/10 mil clicks of adjustment .

Remember, all of the above is based on the assumption that your zero will be near the middle of the adjustment range.

Until you zero and then count your clicks to the bottom (sometimes I REALLY miss the iron sight Service Rifle competitions...), you will just not know.

Let's hope you're NOT on at 100 with something "interesting" like 10 mils up from the bottom! Then it would be either hello, holdover, or get yourself another 5.8 mils with a 20 MOA base, or 8.7 more mils with a 30 MOA base.

At least now you can just BUY these things. In the 1980s I was trying to work with a SFP Leatherwood ART-MPC with a notsodurable late model Weaver 3x9x40 scope and no parallax adjustment. It was cool enough when it worked, but calibration was a bit hard to verify.

 

[1911pro]

Re: So I have 156 1/10 mil clicks of adjustment .

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: BCP</div><div class="ubbcode-body">You would probably need roughly 4mils of holdover for 1k yards so I don't see why you couldn't hold over.

edit: I'm guessing after zero you'll have about 6.5-7mil of up and need 10.5-11.5 for 1k depending on load. </div></div>

Thanks

 

[sawman556]

Re: So I have 156 1/10 mil clicks of adjustment .

What kind of rifle is it on? A Weaver 20moa base is less than 40 bucks.

 

[1911pro]

Re: So I have 156 1/10 mil clicks of adjustment .

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Grump</div><div class="ubbcode-body">Remember, all of the above is based on the assumption that your zero will be near the middle of the adjustment range.

Until you zero and then count your clicks to the bottom (sometimes I REALLY miss the iron sight Service Rifle competitions...), you will just not know.

Let's hope you're NOT on at 100 with something "interesting" like 10 mils up from the bottom! Then it would be either hello, holdover, or get yourself another 5.8 mils with a 20 MOA base, or 8.7 more mils with a 30 MOA base.

At least now you can just BUY these things. In the 1980s I was trying to work with a SFP Leatherwood ART-MPC with a notsodurable late model Weaver 3x9x40 scope and no parallax adjustment. It was cool enough when it worked, but calibration was a bit hard to verify. </div></div>
Got ya. I will try and get out this weekend and sight her in. Ah the 80s. There are alot of things I miss about that time.

 

[1911pro]

Re: So I have 156 1/10 mil clicks of adjustment .

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: sawman556</div><div class="ubbcode-body">What kind of rifle is it on? A Weaver 20moa base is less than 40 bucks. </div></div>
Rem 700sps. I have a Seekins 0moa base and Rings now. I just do not want to run out and not zero at 100 yards.

 

[Grump]

Re: So I have 156 1/10 mil clicks of adjustment .

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: 1911pro</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: sawman556</div><div class="ubbcode-body">What kind of rifle is it on? A Weaver 20moa base is less than 40 bucks. </div></div>
Rem 700sps. I have a Seekins 0moa base and Rings now. I just do not want to run out and not zero at 100 yards. </div></div>

To bottom out with a 20 MOA base, your 100 zero with a 0-cant base would have to be something more than 5 mils below the center of your elevation adjustment.

In Service Rifle, I shortened my front sight blade BEFORE re-barreling and re-bedding, which took me from my desired 4 clicks up from bottom zero to, IIRC, TWO clicks. It surely would suck to need to hold UNDER for the short-range zeros.

 

[1911pro]

Re: So I have 156 1/10 mil clicks of adjustment .

I have a 15moa leupold base on the way from SWFA. I think that I am going to mount with this one first and see what happens.

 

[1911pro]

Re: So I have 156 1/10 mil clicks of adjustment .

I was finely able to make it to the range yesterday and with the 15moa base I was able to zero at 100 yards with 100 clicks remaining (35moa).
The ammo was 150 grain south african surplus. I am going to shoot some Federal Match 168 next and see where it is at. In case anyone can use the info Leupolds 15moa 1 peice base and Seekins medium rings just clear the varmint barrel with a Butler creek cap.