posted this in reloading then figured this may be a better spot. sorry for the long winded question.. I've been reading about MOA because I've purchased a scope that I can dial in for different ranges. I'm really confused because when I enter my load into a ballistic program it gives me the bullet trajectory (which I understand) and then "come up in MOA" below that. I understand that one MOA is just a hair larger than an inch at 100 yards and 2 inches at 200 yards ect..... so why wouldn't I just dial in the the number of inches that the bullet will drop??? example...100 yard zero...under trajectory for 300 yards it says -12.0 and under "come up in MOA" at 300 yards it says 3.8. I'm not sure how to even dial in 3.8 in MOA on my scope because its 1/4 inch increments????? I guess I'm just confused about MOA and what it is and how it works at different ranges. can anyone explain this to me please????
MOA adjustments?????
- Thread starter candyman
- Start date
Gman757
Well-known member
You can calculate "holdover" or use a calculated number of 1/4 clicks to compensate for bullet drop. This may help....
http://www.mil-dot.com/index.htm
http://www.mil-dot.com/index.htm
Last edited:
bigwheeler
New member
Candyman there are a bunch of websites explaining moa. You really should
do a bit of reading and get this down in you head. Here is one you can start
with but a google search will yield many more.
http://www.scribd.com/doc/2068496/Mils-and-MOA-A-Tactical-Shooters-Guide
do a bit of reading and get this down in you head. Here is one you can start
with but a google search will yield many more.
http://www.scribd.com/doc/2068496/Mils-and-MOA-A-Tactical-Shooters-Guide
U definitely need to study a bit to figure it out. It can get confusing sometimes that's for sure, even after u've been working the system for years. Whenever u're working a multi-stadia reticle or turret for long-range shooting or rangefinding you have to start thinking "angular".
I'm sure it's obvious to see that if u dial to the 4 inch per hundred yd. mark on your scope that that=12" at 300 yds., right? (3x4=12)
That program says 3.8 (or roughly 3 and 3-0.25" hash marks--see that?), because it's calculating MOA not IPHY, and 3.8 MOA=12" at 300 yds. (3.8 x 1.05 IPHY=3.99 IPHY=~12" @ 300 yds.) Can u see it?
Remember MOA is often bastardized to mean 1 IPHY when it's technically 1.0472 IPHY, and is often more correct to say Shooter's MOA (SMOA).
If u use the JBM ballistics program it has the option of calculating trajectory in IPHY and may be better for your scope since it adjusts in IPHY (assuming that the clicks are accurate). If the progam you're using only calcs. in MOA then you're gonna have to do some converting for longer ranges.
I'm sure it's obvious to see that if u dial to the 4 inch per hundred yd. mark on your scope that that=12" at 300 yds., right? (3x4=12)
That program says 3.8 (or roughly 3 and 3-0.25" hash marks--see that?), because it's calculating MOA not IPHY, and 3.8 MOA=12" at 300 yds. (3.8 x 1.05 IPHY=3.99 IPHY=~12" @ 300 yds.) Can u see it?
Remember MOA is often bastardized to mean 1 IPHY when it's technically 1.0472 IPHY, and is often more correct to say Shooter's MOA (SMOA).
If u use the JBM ballistics program it has the option of calculating trajectory in IPHY and may be better for your scope since it adjusts in IPHY (assuming that the clicks are accurate). If the progam you're using only calcs. in MOA then you're gonna have to do some converting for longer ranges.
Last edited:
jakermeister
New member
Your a bit close on your last post. 1 MOA @ 100 yards is 4 "clicks". In order to get 3.8 MOA you would need 15 clicks to get to 3.75 MOA and hold a little high. Your turrets should have numbers on them. One full revolution (turn) of a turret usually gives you 15 MOA.
Urimaginaryfrnd
New member
Both MOA minute of angle and MIL milradian are measurements of an ANGLE - think of it like a piece of pie - the two lines begain where your eye is and as they get farther and farther away they grow farther apart - it's an angle.
For all intents and purposes 1moa is 1 inch at 100 and 2 inches at 200 and 3 inches at 300 etc so if your clicks are 1/4moa per click that single click moves the scope 1/4 in at 100 but at 300 it moves it 1/4 of that 3 inches or 3/4 of an inche per click.
Trajectory of a bulet is an arc and the further out the bullet goes it slows down and drops faster. In Theory all objects fall 32ft per sec per sec which means 32 ft the first second and 64 the second second. Think of what a baseball does when you throw it to the outfield.
Balistics Calculator: http://www.jbmballistics.com/calculations/calculations.shtml
For all intents and purposes 1moa is 1 inch at 100 and 2 inches at 200 and 3 inches at 300 etc so if your clicks are 1/4moa per click that single click moves the scope 1/4 in at 100 but at 300 it moves it 1/4 of that 3 inches or 3/4 of an inche per click.
Trajectory of a bulet is an arc and the further out the bullet goes it slows down and drops faster. In Theory all objects fall 32ft per sec per sec which means 32 ft the first second and 64 the second second. Think of what a baseball does when you throw it to the outfield.
Balistics Calculator: http://www.jbmballistics.com/calculations/calculations.shtml