How much MOA ?

[Topwater]

I have a Big Sky Sightron with a one inch tube that has a total of 25 vertical moa. I’m going to mount it in Burris adjustable rings. My question is: how much moa should I use to be able to accommodate. .22 RF from 50 yds. out to 200 yds. Thanks for your input.

 

[CJ6]

I would do 40 moa. -.020 front bottom +.020 front top and + .020 rear bottom -.020 rear top.

 

[cavedweller60]

I have a Big Sky Sightron with a one inch tube that has a total of 25 vertical moa. I’m going to mount it in Burris adjustable rings. My question is: how much moa should I use to be able to accommodate. .22 RF from 50 yds. out to 200 yds. Thanks for your input.

I have always been told that the optimal mount should be approximately 1/2 the internal adjustment of the scope. A Big Sky 3-9 (you didn't mention what power your scope was so, I used 3-9) has 70 MOA of internal adjustment (according to specs on Midways page) so, a 35MOA mount should be optimal.

If I'm wrong, I'm sure someone will correct me.

 

[shoot4fun]

I have a Big Sky Sightron with a one inch tube that has a total of 25 vertical moa. I’m going to mount it in Burris adjustable rings. My question is: how much moa should I use to be able to accommodate. .22 RF from 50 yds. out to 200 yds. Thanks for your input.

Be aware there are be many factors that change this number for you but my normal elevation from 50 yards to 200 yards is right around 26-27 MOA. Not knowing what rifle you have this mounted on could change my suggestion but I would look at Area419 Dovetail to Picatinny mounts. They sell a few different MOA cants.
Deciding just how much cant you want will be tricky because you may run into a situation where you won't be able to zero at 50 yards with a bunch of cant in the mount.

 

[Topwater]

Just to clarify what I’m using ………… the Sightron is 36 X. It has 10 MOA of vertical adjustment per complete turn. It will turn completely 2 1/2 turns. The online info that I found states 60 MOA of adjustment vertically and in windage. That physically doesn’t work. I have a 0 MOA pic rail mounted on a Kimber 82 G. And, as stated, I’m using Burris 1” x 1” high rings. Maybe this added info helps.

 

[CJ6]

The velocity of your ammo will also make a difference. I use 1058 speed Eley Match.
I'm down 7.2" at 100yds and another 14. 3" at 200yds.
This can very with temps. Colder = more drop.

 

[Topwater]

My average difference between 100 & 200 yds. Is 17 MOA. I just ordered some Black Eley @ 1050 . This is slower than the SK that I’ve seen using. I can already see this will be a new learning curve.

 

[dstoenner]

Don’t forget that the height of the scope off the center line also adds to what you need to account for. A 2 inch center to center would add 2 moa you have to put on the scope.

 

[Topwater]

Just thinking this over in my mind, I believe I’m going to try 35 MOA.

 

[Topwater]

I appreciate all of your input. If you think of anything else please post it.

 

[Topwater]

Here’s a view of her. I set it up with all 40 Moa.

 

[tmwinds]

Just to clarify what I’m using ………… the Sightron is 36 X. It has 10 MOA of vertical adjustment per complete turn. It will turn completely 2 1/2 turns. The online info that I found states 60 MOA of adjustment vertically and in windage. That physically doesn’t work. I have a 0 MOA pic rail mounted on a Kimber 82 G. And, as stated, I’m using Burris 1” x 1” high rings. Maybe this added info helps.

If you are saying that you only have 25 MOA vertical adjustment from the turrets being topped out to bottomed out you have a defective scope that needs to be sent to Sightron for repair.
I have the same scope and I can easily get 60 MOA from bottom to top.

 

[Topwater]

If you are saying that you only have 25 MOA vertical adjustment from the turrets being topped out to bottomed out you have a defective scope that needs to be sent to Sightron for repair.
I have the same scope and I can easily get 60 MOA from bottom to top.

Thanks for the information. I thought that something could be amiss. I bought this from an individual related to this forum. I had read online that it had 60 MOA. Maybe I got snookered.

 

[tmwinds]

Thanks for the information. I thought that something could be amiss. I bought this from an individual related to this forum. I had read online that it had 60 MOA. Maybe I got snookered.

I would call Sightron customer service and talk with them. I had a friend that dropped his rifle on a concrete floor and mangled the scope. They repaired it at no charge.

 

[Dannybcc]

How many turns down do you have. I would guess you are zeroed above the optical center of the scope. You need to add the two together if I am reading you correctly.

 

[jpjulian]

Kimber 82?

 

[lal357]

If you are saying that you only have 25 MOA vertical adjustment from the turrets being topped out to bottomed out you have a defective scope that needs to be sent to Sightron for repair.
I have the same scope and I can easily get 60 MOA from bottom to top.

Does it have a zero stop in it they can take some travel by using it

 

[tmwinds]

Does it have a zero stop in it they can take some travel by using it

The Sightron Big Sky 36x I have does not have a zero stop feature.

 

[Tacoma]

It only takes 20-25 MOA (rifle and ammo dependent) to get to 200 yds from 50 yds. If/when you get your scope straightened out to give you the full 60 MOA advertised, you'll have no problem getting to 200 yds without having to add MOA in the rings. You might even get the 50ish MOA needed to get to 300 but you'd likely have to hold over to some level.

 

[Topwater]

I would like give a big shoutout to Dale at Sightron. I asked if I should send a check to at least cover the shipping. He said it was unnecessary. He phoned me and was extremely helpful. The scope should be here on Tuesday. He wasn’t specific as to what was done with it. He told me that this particular scope is older and has only 40 MOA instead of 60. I feel confident that I might be able to reach 300 yds. utilizing the 40 MOA available with the Burris rings.