What MOA mean when describing ProPoint
GeorgePSW
What does 3moa or 7moa mean when used to describe one of the ProPoint
red-dot sights? Is is the SIZE of the red dot?
If so... what's the dis/or/advantage of a 3moa dot vs. a 7moa dot?
Thanks
Jeffrey Maass
GeorgePSW (Geor...@azone.net) wrote:
: What does 3moa or 7moa mean when used to describe one of the ProPoint
: red-dot sights? Is is the SIZE of the red dot?
Yes, the 3-minute dot is smaller, and is best for bullseye-type shooting.
The 7-minuted dot is larger, and is the bottom-end of a good size for
IPSC, Bowling Pins, speed steel, etc. I thought that the larger-size
ProPoint was 10-minute?
Dots are available up through about 20-minutes.
DVC,
: If so... what's the dis/or/advantage of a 3moa dot vs. a 7moa dot?
: Thanks
--
Jeff Maass (jma...@freenet.columbus.oh.us) Amateur Radio K8ND
USPSA/IPSC # L-1192 NROI/CRO NW of Columbus Ohio
Lippmann's Law: "When all think alike, no one thinks very much."
ltl919
GeorgePSW wrote:
#
# What does 3moa or 7moa mean when used to describe one of the ProPoint
# red-dot sights? Is is the SIZE of the red dot?
#
# If so... what's the dis/or/advantage of a 3moa dot vs. a 7moa dot?
#
# Thanks
Yup, it is the size of the dot. A 7 MOA dot spans 7"@100 yards,
so if you are planning to use it at that range, the dot
may be a little too large for your target. Large dots make
for fast acquistion at close ranges, but you need a smaller dot
for longer range shots.
Erik Reikes
GeorgePSW wrote:
# What does 3moa or 7moa mean when used to describe one of the ProPoint
# red-dot sights? Is is the SIZE of the red dot?
#
# If so... what's the dis/or/advantage of a 3moa dot vs. a 7moa dot?
#
MOA stands for minute of angle, and basically indicates the size of the
dot (or the size of the grouping). A minute is, I believe 1/60 of a
degree, with 360 degrees making up a circle all the way around you. You
can convert from moa to size of dot on target like so : size on target =
distance_to_target * tan (num_MOA/60). So, for example :
size_on_target = 100Yards * tan (1 MOA/60) = .029 yards = 1.04 inches.
1MOA at 100 yards is about an inch in diameter.
Smaller dot is more accurate, but bigger dot is quicker to sight...
-Erik
# Thanks
nb
MOA refers to the degree of arc subtended by the angular displacement of
the projected object at some set distance. That's not entirely clear
mathematical language, so I'll try again:
MOA refers to the size of the dot at a distance.
One M.O.A., is one minute out of 360 in a complete circle. a 1 minute
arc at 100 meters subtends (covers) approximately 1 inch. A three minute
dot will cover slightly more than 3 inches at 100 meters, 1.5 inches at
50 meters, and .75 inches at 25 meters. If your hold is steady, the
smaller dot, once zeroed to your gun, should put all rounds in a group
covered by the dot. A 7 MOA dot, will cover 7 inches at 100 meters, and
so on.
Smaller is usually better, but remember that there is a limit to their
effectiveness based upon parallax, steadiness of the scope, and other
things. Hold a straight pin at arm's length and try to keep it steadily
covering some object in the distance; it isn't easy.
For a more complete discussion of this topic, go to the competetive
shooting network homepage, there's a really good article about red dot
sights:
http://ourworld.compuserve.com/homepages/Dreyer_infonet/shooting.htm
GeorgePSW wrote:
# What does 3moa or 7moa mean when used to describe one of the ProPoint
# red-dot sights? Is is the SIZE of the red dot?
#
# If so... what's the dis/or/advantage of a 3moa dot vs. a 7moa dot?
#
# Thanks
LukeMann
#What does 3moa or 7moa mean when used to describe one of the ProPoint
#red-dot sights? Is is the SIZE of the red dot?
#
#If so... what's the dis/or/advantage of a 3moa dot vs. a 7moa dot?
#
#Thanks
#
I THINK that it is the size of the area that the dot will cover at 100 yards.
Like 3 MOA would be about 3 inches of target covered at 100 yards. The smaller
the dot the more precise shooting you could do and the bigger one would be
quicker to find for fast shooting.
I'm not 100% sure so please correct me if I'm wrong
Luke
Good....Bad....I'm the guy with the gun.
Rjski3412
In basic terms, a 3moa dot will cover approximately 3 inches at 100 yard, and
the 7moa will cover 7 inches at that range. The larger dots are typically used
for action shooting, the smaller for targets at longer ranges. If you want the
best of both worlds, The Tasco PDP5 has a selectable 4,8,12, 16 moa dot scope
that you can find for about $160, comes in handy on multi-purpose guns. Enjoy.
Louis Boyd
GeorgePSW wrote:
#
# What does 3moa or 7moa mean when used to describe one of the ProPoint
# red-dot sights? Is is the SIZE of the red dot?
That refers to the apparent angular diameter of the dot. If you're
target were at 100 yards, the spot would appear to be 3" (or 7") in
diameter. If the target is at 25 yards, the dot appears to be .75" (or
1.75" in diamter.
# If so... what's the dis/or/advantage of a 3moa dot vs. a 7moa dot?
Supposedly the larger dot is brighter and easier to acquire and helps
in rapid fire. The smaller dot is easier to concentrate on and
superimpose on the target center. Supposedly better for slow fire.
Those bullseye shooters who use dot scopes usually choose the smaller
dot. (The purist's and better shooters use metalic sights).
Lou Boyd
FCSA - NRA