Scope base for ELR... How many moa do YOU use?

[upSLIDEdown]

Just spoke with Skylar at SWFA, and he said basically at the factory, they try to maximize total elevation travel in each individual scope, and that's why they don't have a "total elevation" listed for them. They are all guaranteed to have at least 30mils, but one could have 32, one could have 34, the next 38, then 40, and so on and so forth. So that really doesn't help me at all. lol

 

[MontanaMarine]

Hrmmm... Good to know. Yeah, I was trying to figure up how big a 24x24 target would be last night in mils and if the reticle would cover it. The reticle on the SS is super thin. It gets thinner with higher magnification too. 12, 16, 20x is .040, .035, & .030 mils, respectively.

My math would put 24x24" at .66 mil at 1K yards, .33 mil at 2K yards, roughly .27 mil at 3K yards.

 

[upSLIDEdown]

I got .23 @ 3k. Either way, a .04 or .03 reticle won't cover it.

 

[MontanaMarine]

Yeah the reticle is nice and fine. Probably not a top pick for fading light. For general LR use, it's pretty good.

 

[FEENIX]

How about 150 MOA rail? gun)>>> Home

http://www.longrangehunting.com/forums/f65/we-make-arc-rizer-116751/

 

[Broz]

I can share some of my data if you are wanting to get to 3K for a center reticle hold.

338 Terminator +P sending 300 Berger OTM's at 3198 fps.

4100 ' ASL

it takes about 120 moa up from a 200 yard zero to get to my 2971 yards target.

With my NF ATACR and a 60 MOA rail I can hold center reticle. I have 126 moa up from my zero.

Jeff

 

[upSLIDEdown]

How about 150 MOA rail? gun)>>> Home

http://www.longrangehunting.com/forums/f65/we-make-arc-rizer-116751/

I looked at it, as well as the MOAB150, and I've found one single person using the MOAB, and none using the Arc-Rizer. With no real world usage and reviews anywhere, it's kinda hard to spend that kinda money on them. Trust me, I wrestled with it and searched a lot, looking for info out there.

I can share some of my data if you are wanting to get to 3K for a center reticle hold.

338 Terminator +P sending 300 Berger OTM's at 3198 fps.

4100 ' ASL

it takes about 120 moa up from a 200 yard zero to get to my 2971 yards target.

With my NF ATACR and a 60 MOA rail I can hold center reticle. I have 126 moa up from my zero.

Jeff

Right on. Seems the ATACR is pretty popular. Wish I had the cash to put into one right now. Thanks for the info though, that helps a lot! Can't wait to see what this thing will do.

 

[BergerBoy]

I think that it matters what scope you use more than anything. Obviously some scopes can't use a 40 moa base and some can.
In my opinion the extra moa is always a good thing but not really necessary in most cases. Example: I have a NF NXS 5.5-22 on a 20 moa base on Stiller action zeroed at 100 yds. I have 72.75 moa of elevation. At my altitude that puts me over roughly 1800 yds. plus another 20 in the reticle. So do I need a 40 moa base? I know we are always wanting to go farther n farther but that is a long shot by most any standard. Also, the application is important. What type of rifle is it on? If someone buys a Cheytac they most likely bought that to shoot over 1800 yds so I would put as steep of a base that the scope could safely handle.
Lastly, I know a lot of guys shoot 2000 with my scope but at a mile things are really small to me even at 22x. In most top of the line scopes I feel that the elevation exceeds the magnification of the scope- what can you see clearly.
That is just my opinion and experience. There are A LOT of guys that shoot farther and are better than I am on here.
Good Luck

 

[Punisher]

buy a 30 and a 40 MOA base. it sounds like you want to lean toward the 40 moa. so try it, if you can still zero it, then return the 30, sell it or just hang onto it for later.

some of this depends on your exact setup. for instance i use a 20 moa vortex viper and my scope is nearly bottomed to get a zero. i have the remaining 65+moa in the up direction.

 

[upSLIDEdown]

I think that it matters what scope you use more than anything. Obviously some scopes can't use a 40 moa base and some can.
In my opinion the extra moa is always a good thing but not really necessary in most cases. Example: I have a NF NXS 5.5-22 on a 20 moa base on Stiller action zeroed at 100 yds. I have 72.75 moa of elevation. At my altitude that puts me over roughly 1800 yds. plus another 20 in the reticle. So do I need a 40 moa base? I know we are always wanting to go farther n farther but that is a long shot by most any standard. Also, the application is important. What type of rifle is it on? If someone buys a Cheytac they most likely bought that to shoot over 1800 yds so I would put as steep of a base that the scope could safely handle.
Lastly, I know a lot of guys shoot 2000 with my scope but at a mile things are really small to me even at 22x. In most top of the line scopes I feel that the elevation exceeds the magnification of the scope- what can you see clearly.
That is just my opinion and experience. There are A LOT of guys that shoot farther and are better than I am on here.
Good Luck

buy a 30 and a 40 MOA base. it sounds like you want to lean toward the 40 moa. so try it, if you can still zero it, then return the 30, sell it or just hang onto it for later.

some of this depends on your exact setup. for instance i use a 20 moa vortex viper and my scope is nearly bottomed to get a zero. i have the remaining 65+moa in the up direction.

This is going on a 338 Edge. I figured it was go big or go home. I ordered a 60moa base from Ken Farrell. We'll see what happens.

 

[Punisher]

your scope has c. 100 MOA of total adjustment. or 50 MOA in each direction. if you go to a 60 MOA scope base, you will not have a 100 yard zero. you will be zeroed at 10 or 11 MOA... so about 5-600 yards. you would have to hold under on closer shots. i prefer to keep my rig simple and keep the sighting in process easy at 100 yards.

have you run a ballistic calculator with a perspective load yet to see how much drop there is at the range you intend to be shooting?

say hypothetically, 2000 yards is 75 moa of drop from the muzzle, and you have 50 moa of adjustment in the scope, so 75-50= 25 moa needed for scope base

 

[Punisher]

i hope this posts right. if it doesn't... with a 60 moa scope base you'll get between 2100 and 2300 yards... but won't have a 100 yard zero.



Calculated Table
Range Drop Drop Windage Windage Velocity Mach Energy Time Lead Lead
(yd) (in) (MOA) (in) (MOA) (ft/s) (none) (ft•lbs) (s) (in) (MOA)
500 -46.5 -8.9 13.5 2.6 2118.1 1.897 2490.0 0.621 0.0 0.0
600 -75.7 -12.0 20.0 3.2 2002.0 1.793 2224.5 0.767 0.0 0.0
700 -113.5 -15.5 27.9 3.8 1889.8 1.693 1982.2 0.921 0.0 0.0
800 -161.0 -19.2 37.6 4.5 1781.8 1.596 1762.1 1.085 0.0 0.0
900 -219.5 -23.3 48.9 5.2 1678.3 1.503 1563.4 1.258 0.0 0.0
1000 -290.4 -27.7 62.2 5.9 1579.8 1.415 1385.3 1.442 0.0 0.0
1100 -375.2 -32.6 77.5 6.7 1486.9 1.332 1227.0 1.638 0.0 0.0
1200 -475.8 -37.9 94.9 7.6 1400.0 1.254 1087.8 1.846 0.0 0.0
1300 -594.1 -43.6 114.7 8.4 1320.0 1.182 967.0 2.067 0.0 0.0
1400 -732.4 -50.0 136.7 9.3 1247.5 1.117 863.8 2.301 0.0 0.0
1500 -893.1 -56.9 161.0 10.3 1183.4 1.060 777.3 2.549 0.0 0.0
1600 -1078.7 -64.4 187.6 11.2 1128.2 1.011 706.4 2.809 0.0 0.0
1700 -1291.6 -72.6 216.4 12.2 1081.5 0.969 649.2 3.081 0.0 0.0
1800 -1534.4 -81.4 247.1 13.1 1042.2 0.933 602.8 3.364 0.0 0.0
1900 -1809.3 -90.9 279.6 14.1 1008.5 0.903 564.5 3.658 0.0 0.0
2000 -2118.5 -101.2 313.8 15.0 979.1 0.877 532.1 3.961 0.0 0.0
2100 -2464.4 -112.1 349.5 15.9 953.0 0.854 504.1 4.273 0.0 0.0
2200 -2848.9 -123.7 386.8 16.8 929.4 0.832 479.4 4.594 0.0 0.0
2300 -3274.1 -135.9 425.5 17.7 907.8 0.813 457.4 4.923 0.0 0.0
2400 -3742.1 -148.9 465.7 18.5 887.8 0.795 437.5 5.260 0.0 0.0
2500 -4255.1 -162.5 507.2 19.4 869.2 0.779 419.4 5.605 0.0 0.0

 

[BergerBoy]

I would go with the 40 moa base then since it's going on an 338 Edge. My opinion is that a 60 is too much. JMO

 

[upSLIDEdown]

have you run a ballistic calculator with a perspective load yet to see how much drop there is at the range you intend to be shooting?

i hope this posts right. if it doesn't... with a 60 moa scope base you'll get between 2100 and 2300 yards... but won't have a 100 yard zero.



Calculated Table
Range Drop Drop Windage Windage Velocity Mach Energy Time Lead Lead
(yd) (in) (MOA) (in) (MOA) (ft/s) (none) (ft•lbs) (s) (in) (MOA)
500 -46.5 -8.9 13.5 2.6 2118.1 1.897 2490.0 0.621 0.0 0.0
600 -75.7 -12.0 20.0 3.2 2002.0 1.793 2224.5 0.767 0.0 0.0
700 -113.5 -15.5 27.9 3.8 1889.8 1.693 1982.2 0.921 0.0 0.0
800 -161.0 -19.2 37.6 4.5 1781.8 1.596 1762.1 1.085 0.0 0.0
900 -219.5 -23.3 48.9 5.2 1678.3 1.503 1563.4 1.258 0.0 0.0
1000 -290.4 -27.7 62.2 5.9 1579.8 1.415 1385.3 1.442 0.0 0.0
1100 -375.2 -32.6 77.5 6.7 1486.9 1.332 1227.0 1.638 0.0 0.0
1200 -475.8 -37.9 94.9 7.6 1400.0 1.254 1087.8 1.846 0.0 0.0
1300 -594.1 -43.6 114.7 8.4 1320.0 1.182 967.0 2.067 0.0 0.0
1400 -732.4 -50.0 136.7 9.3 1247.5 1.117 863.8 2.301 0.0 0.0
1500 -893.1 -56.9 161.0 10.3 1183.4 1.060 777.3 2.549 0.0 0.0
1600 -1078.7 -64.4 187.6 11.2 1128.2 1.011 706.4 2.809 0.0 0.0
1700 -1291.6 -72.6 216.4 12.2 1081.5 0.969 649.2 3.081 0.0 0.0
1800 -1534.4 -81.4 247.1 13.1 1042.2 0.933 602.8 3.364 0.0 0.0
1900 -1809.3 -90.9 279.6 14.1 1008.5 0.903 564.5 3.658 0.0 0.0
2000 -2118.5 -101.2 313.8 15.0 979.1 0.877 532.1 3.961 0.0 0.0
2100 -2464.4 -112.1 349.5 15.9 953.0 0.854 504.1 4.273 0.0 0.0
2200 -2848.9 -123.7 386.8 16.8 929.4 0.832 479.4 4.594 0.0 0.0
2300 -3274.1 -135.9 425.5 17.7 907.8 0.813 457.4 4.923 0.0 0.0
2400 -3742.1 -148.9 465.7 18.5 887.8 0.795 437.5 5.260 0.0 0.0
2500 -4255.1 -162.5 507.2 19.4 869.2 0.779 419.4 5.605 0.0 0.0

I've run a rough estimate in Shooter, and my numbers definitely don't match up with your numbers. You show 162.5moa for 2500yds. Mine shows 116.5moa. And that's with a 100yd zero. A 500yd zero brings it down to 108moa. Guess we'll find out soon enough. I'm actually hoping to end up with more than 100moa of adjustment though, so we'll see how it all plays out.

I would go with the 40 moa base then since it's going on an 338 Edge. My opinion is that a 60 is too much. JMO

See below.

This is going on a 338 Edge. I figured it was go big or go home. I ordered a 60moa base from Ken Farrell. We'll see what happens.