How many inches is .9 MOA ?

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charliebrown1999

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Jul 25, 2018
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#1
My AR15 was hitting dead center at 200yds . I wanted to shoot plates at 300yds . I moved the elevation turret up 9 clicks in order to hit a 10 inch steel plate at 300yds. My hits were mostly in the center. There was very little wind-maybe 5mph. My cheap scope's turrets are marked 1 click equals 1/4 inch at 100yds. How many inches of elevation did i move the point of impact? That would also be the drop between 200yds and 300yds??. My AR15 has a 18inch CHF "machine gun steel" chrome plated 1 in 8 twist bbl . I was using Wolf Gold 55gr brass case ammo.
 
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#2
1 moa is 1 inch a 100 yards, 1 moa at 300 is 3 inches .

(3 in/ 1 moa) x .9 moa= 2.7 inches

You moved 2.7 inches

I'm not an expert and someone correct me if I'm wrong
 
#3
Your scope isn't adjusting in MOA, it's adjusting at inches per hundred yards, IPHY.

One MOA at 100 yards is 1.047"

A 1/4" adjustment at 100 yards, would theoretically equal 3/4" at 300 yards.

So technically speaking, you adjusted your hold by 2.7" with a .9 IPHY adjustment.

Does your scope really adjust in .1 IPHY increments?
 
#5
MinnesotaMulisha said:
Your scope isn't adjusting in MOA, it's adjusting at inches per hundred yards, IPHY.

One MOA at 100 yards is 1.047"

A 1/4" adjustment at 100 yards, would theoretically equal 3/4" at 300 yards.

So technically speaking, you adjusted your hold by 2.7" with a .9 IPHY adjustment.

Does your scope really adjust in .1 IPHY increments?
Click to expand...
the turret reads 1 click is 1/4 inch at 100yds
 
#8
charliebrown1999 said:
my bad i moved it from 7.2 to 8.1 a total of 9 clicks.. turret reads 1 click equals 1/4 inch at 100yds
Click to expand...
I have some bad news for you. There are four “clicks” per moa or IPHY if you’re running 1/4 moa or IPHY turrets. So your adjustment from 7.2 to 8.1 cannot be 0.9moa. If you’re thinking in the terms of 7.1, 7.2, 7.3, 8.0, 8.1, etc then that’s 3/4 moa or IPHY depending on your turrets. 9 clicks in MOA is a 2.1 moa adjustment.

May i ask what scope you have and or a picture of it?
 
#10
Krob95 said:
I have some bad news for you. There are four “clicks” per moa or IPHY if you’re running 1/4 moa or IPHY turrets. So your adjustment from 7.2 to 8.1 cannot be 0.9moa. If you’re thinking in the terms of 7.1, 7.2, 7.3, 8.0, 8.1, etc then that’s 3/4 moa or IPHY depending on your turrets. 9 clicks in MOA is a 2.1 moa adjustment.

May i ask what scope you have and or a picture of it?
Click to expand...
it is a busnell 4x12x40 . i cannot get to it right now
 
#12
Yeah. It sounds like if you heard 9 clicks on a 1/4 moa turret, you adjusted 2 1/4 moa. Which at 200 yards comes out to 4.71”. At 300yds that’s 7.06”.

Update: these numbers are calculated based off of 1moa @ 100 yds = 1.047” (thanks Rkpnw foradding this below as well)

FWIW 0.1 increment are used on mil scopes as there are 10 0.1 increments in each mil.
 
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#13
Wow, wasn’t planning on cracking a beer until after lunch. Guess I’m not gonna make it.

OP,did you randomly go up 9 clicks or did you fire some and adjust? Just curious.

Either way, read the manual for your scope and you’ll be a much better trigger puller for it.
 
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#14
Krob95 said:
Yeah. It sounds like if you heard 9 clicks on a 1/4 moa turret, you adjusted 2 1/4 moa. Which at 200 yards comes out to 4.71”. At 300yds that’s 7.06”.

FWIW 0.1 increment are used on mil scopes as there are 10 0.1 increments in each mil.
Click to expand...
this
this calculated using true MOA 1.047 inch rather than 1" at 100.

Clarifying for OP
 
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#15
Your bullet drop is going to be approximately 10 inches from the 200 yards "zero" to the 300 center fyi.

***also, assuming you did in fact move the turret UP and not DOWN by mistake (it happens), you should see approx 7" in elevation gain as previously stated
 
#17
isofahunter said:
I am still confused. If .25 inch per click you should have 7 7.25 7.5 7.75 8 8.25.... If you were at 7.25 and went 9 clicks you should have been at 9.5 if my fingers are working right.
Click to expand...
I believe his math was off when he commented that, not understanding how far each click was moving the reticle.
 
#19
Krob95 said:
I have some bad news for you. There are four “clicks” per moa or IPHY if you’re running 1/4 moa or IPHY turrets. So your adjustment from 7.2 to 8.1 cannot be 0.9moa. If you’re thinking in the terms of 7.1, 7.2, 7.3, 8.0, 8.1, etc then that’s 3/4 moa or IPHY depending on your turrets. 9 clicks in MOA is a 2.1 moa adjustment.

May i ask what scope you have and or a picture of it?
Click to expand...
bushnell buckmaster marked 1 click equals 1/4 inch at 100yds. manual states turrets clicks are 1/4MOA
 
#22
Can you post some pictures of the turrets?

Edit: a quick google search shows nothing about that scope. Nikon makes or made a buck master scope. Bushnell made a buckhorn series scope.
 
#25
charliebrown1999 said:
My AR15 was hitting dead center at 200yds . I wanted to shoot plates at 300yds . I moved the elevation turret up 9 clicks in order to hit a 10 inch steel plate at 300yds. My hits were mostly in the center. There was very little wind-maybe 5mph. My cheap scope's turrets are marked 1 click equals 1/4 inch at 100yds. How many inches of elevation did i move the point of impact? That would also be the drop between 200yds and 300yds??. My AR15 has a 18inch CHF "machine gun steel" chrome plated 1 in 8 twist bbl . I was using Wolf Gold 55gr brass case ammo.
Click to expand...
Why do you care about how many inches the point of impact moved?

We only care about angular measurements
 
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#27
Forget MOA, the scope turret is IPHY. 1/4" per click at 100yd = 3/4" per click at 300. Multiply by 9 clicks. That gives you 6.75 inches of drop between your zero (at 200yd) and 300.
giphy.gif

You could do a bunch of math to convert that to an angle (in MOA) but the turret's not calibrated that way, so it's not particularly helpful.
 
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