20/30 moa rail

[mel]

i need one for an experiment with my digital scope so im just looking for something cheap but atleast halfway decent for testing

what do u guys know of that will add minimal height and be atleast 20 moa that i can trust to stay put and not shift around

the reason for not just going and buying a exspensive good one right off the bat is that my digital scope will recalculate the drop numbers based on angle, im afraid the scope will be off with a rail so i wanna test and see if i can get the scope to play nice with a 20/30 rail before i spend a good bit of money on a set of rings/rail

[VASCAR2]

Warne SKEL 20 MOA are around $100 to $125. Several vendors carry them. Midway and Brownell’s have house brand for less than $100 but have less metal removed but are heavier.


I bought the 30 MM mount but haven’t used it (AR Stoner 20 MOA) on sale for $55. I don’t think you’ll beat that price. I bought a 1” 20 MOA mount and is gtg but heavier than the Warne.

https://www.midwayusa.com/product/1019614720

[mel]

Thanks that should work just fine for what I wanna try though i was thinking more along the lines of a rail so i wouldnt have to change my scope rings back and forth but hell not that big of a deal i guess

[Klem]

mel,

Do you need a sloping rail to test the scope's offset function?

You could enter 20 or 30MOA into the scope and see whether the MPI drops the correct amount at 100yd. Surely that's the same thing?

[VASCAR2]

A few years ago there were several AR-15 rails for a-fixing scope rings to get higher scopes or a cant, typically 10- 20 MOA. I wonder if the extra rail has fallen out of favor because it just adds another piece which can come loose or add weight. Brownell’s still list an EGW rail but it is cheaper to just buy a canted one piece mount.


https://www.brownells.com/optics-mountin...27085.aspx

[mel]

mel,

Do you need a sloping rail to test the scope's offset function?

You could enter 20 or 30MOA into the scope and see whether the MPI drops the correct amount at 100yd. Surely that's the same thing?

no offset function that i know of , so the scope works like this , it assumes a perfectly level mount so if u range a target and the scope detects 0* angles bullet drop calculations take that into account , now take the same target and if ur shooting on say a -/+5 * incline /decline the balistic calcs take that into consideration when doing the calcs and adjusts accordingly . im assuming that with a 20 or 30 etc mount its going to throw off the ballistics calculator , i want a cheap rail/mount to do some testing with to see if i can figure out how to correct this, i think i have a good idea on how to correct this issue but wont know till i can actually test it out

right now i run out of adjustment in the scope at 1924y shooting the 130g rdf out of my current grendel ,

[Klem]

OK, I get what you are saying. The scope automatically adjusts for slope if you are shooting up or down hills from the horizontal, like angle compensators in shooting laser rangefinders. Your scope must have an inbuilt angle sensor.

Surely there is some way of slaving the scope's dot to the gun - the electronic equivalent to zeroing the rifle. And surely the angle compensator kicks in only after the scope has been zeroed.

Do you have access to a bolt gun with an angled rail?

[mel]

OK, I get what you are saying. The scope automatically adjusts for slope if you are shooting up or down hills from the horizontal, like angle compensators in shooting laser rangefinders. Your scope must have an inbuilt angle sensor.

Surely there is some way of slaving the scope's dot to the gun - the electronic equivalent to zeroing the rifle. And surely the angle compensator kicks in only after the scope has been zeroed.

Do you have access to a bolt gun with an angled rail?

it does have built in angle and cant sensors ,hmm i wonder if it locks in the angle of when u zeroed and takes that into account on further calcs it does since u do the zero with the ballistics calculator off , ill have to check up on that

i dont unfortunatly everything i have has a flat rail

[Klem]

Yes, that would be it. You zero the gun first and then switch it on.

Because the gun's zero is never exactly the centre of a scope your scope will be no different. The manufacturer expects that guns will need the dot to go up or down to zero, which is equivalent of having an angled rail. Then the angle compensator kicks in but only after zeroing is complete. I really think you don't need to buy a rail to test this.

[Growler]

If you are shooting up or down a 20 degree slope, there will be noticeable effect on your firing solution.
1/3 (20 moa) to 1/2 (30 moa) degree of incline will be negligible in terms of flight path vs horizontal path. Your firing position varies more than that each time you get set up.

[PVBoom]

Wow. I was just looking at Midway and its a bit ridiculous. So a simple picatinny riser is in the 10-20+ range. But as soon as you want 20 MOA with it prices get stupid.
I have an unused 1 inch riser, but that won't get you the MOA you want.

I think if you figure out what the difference in height would be, you should try putting a shim underneath the back of your scope and test with that.
That gets you minimum height overall and the cant you need to test.

For 30 MOA, .0525"

.017 + .088 /2 = 1.05/2 = .0525"


This guys page gives you the numbers you need.
This says that all the rails are (in inches) .783 high at the front, then the backs are .8, .87, .888 or .957 to get 10, 50, 60, 100 MOA.

https://fieldandcaveoutfitters.com/produ...moa-risers


All rails are 6” long x 1-3/8” wide (including clamps) and add .783” to the height of your existing rail on the front (assuming you are using them to increase the angle). Weights below are approximate & include clamps and screws
10 MOA – Adds .800” to the height measured at the rear & weighs 8.1 ounces
50 MOA – Adds .870” to the height measured at the rear & weighs 8.3 ounces
60 MOA – Adds .888” to the height measured at the rear & weighs 8.4 ounces
100 MOA – Adds .957” to the height measured at the rear & weighs 8.7 ounces


And here is the explanation of how MOA cant works, which I needed.

https://warnescopemounts.com/20moa-explained/