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There's this article online about sights. I ran it through Google translate, but the result made no sence, so I had to edit it quite a bit. Hopefully you get the idea.
Some comments:
You say circle inserts, so I use the same Word here, or just circle.
R/J shooters = recruit and junior.
Long and short barrels. the Sauer 200 str comes With barrellengths from 67 - 74 mm. http://en.wikipedia.org/wiki/Sauer_200_STR
Fieldshooting: In Norway a highpower match has 5 targets on various distances from i.e 90 - 600 metres. The targets are out in the terrain, so the shooters must walk from position to position. On the shooting position, they must judge the distance to the target and adjust their sights. The targets have irregular shapes, and various sizes. The normal way of jugdeing the distance to the target is by using the sights. If you know how big a certain target is in your "circle" at i.e. 100 metres, then you can judge the distance by how many targets will fit in the circle. Experienced shooters are very good at this, and are dead on all the time. Smallbore matches are shot at 100 meters, by junior and old shooters.
Here we go:
How to use the sights, and how to choose the right frontsight insert.
This article was previously published in Norwegian Shooter Official Journal . Author is former national champion John Olav Ågotnes
Targetshooting – circle inserts
What kind of circle insert size is best to use is a topic often discussed among shooters with strong opinions.
I shall give some rules of thumb for selecting circle inserts.
Young shooters often use too small circle inserts. This may be because the "young eyes " have muscles that can better adapt the intensive focus. However, it is often you sees signs that R / J - shooters use too small circle inserts .
It is easier to decide when the target is in the center when only a small clearance between target and circle. This is also very demanding for the muscles in the eye.
R / J - shooters with small circles often find that they shoot significantly better in the first series of shots than in the later. .
Shooters who shoot standing, where movement of the weapon is clearly greater than in lower positions, often prefer small circles as it is " easier to decide ." (when to pull the trigger).
A rule of thumb is to have a circle that provides a coverage width that is twice as large as the target . With a long barrel, that will say about 4.0 mm at 2-300 meters . Similarly, for 100 meters will be about 4.8 mm, then the target at 100 yards is 20% larger . When the target is easier to see, the closer the comes, it will be more natural to use about 4.2 to 4.4 mm at 100 meters with a long barrel. ( short barrel minus 0.2 mm) Those who are used to small circles will initially feel it’s difficult with larger circles.
What is interesting is not what one feels but what the result in the target shows . It is also easier to see your mistakes and “pull outs” with a normal circle than with a small one. It looks worse but the results are often better. It must also be noted that
nearsighted people use generally slightly smaller circles and farsighted use generally slightly larger circles
What do the best use?
.
It is always wise to see what the top shooters use . After speaking
with the elite of Norwegian target shooters , most use from 4.0 to 4.5 at 2-300 meters.
Wall thickness: The rule of thumb for thickness is 1/ 3 of the circle diameter.
I.e. from 3.6 - 1.2 and 4.2 - 1.4 . There is also much to be gained from switching circles under different light conditions . With the sun in the back and strong sunshine on the target, there will be an advantage with smaller circles with thicker walls.
Thicker walls offers better contrast. Similarly, if shooting in misty and cloudy weather, larger circle with thinner walls.
Choosing diopter hole.
Those who use weapons with Busk sights know that you can choose from six
different diopter holes . Only the three smallest should be used , because they provide diopter effect .The three largest is a peep sight.
Diopter effect.
When the diopter hole is about 1.2 mm or less, it provides the diopter effect.. Everything we see through the hole is then clear. For example , we see the circle
and target sharply simultaneously. Same principle as in photography. Using small aperture makes the image sharp in depth. Using the peep sight we must focus from circle to target constantly.
Another thing one should be aware of with peep sights is to have the circle in the middle of the rear sight to avoid different point of impact from shot to shot. The same applies to those who use variable iris aparture. The diopter effect disappears at about 1.2 mm. Bright light on the target can also be countered with color filters . Whether the color filter in iris or colored glass in spectacles . Gray or brown glass then gives the best effect. In hazy and cloudy weather many prefer a yellow glass / filter . Be aware that even if the contrast is improved somewhat, yellow glass filter away about 15 % of the light .
Fieldshooting
Unlike target shooting, one should use the same circle throughout the fieldshooting season . This is because two circles rarely provides the same POI, and in fieldshooting you have no test shots to correct for POI before shooting.
The template is here from 2.8 mm to 3.4 mm on both highpower and smallbore matches. In a highpower match, where one must judge the distance using coverage width of the circle ,it is advantageous to use a circle with as thin walls as possible, without loosing the clearness of the circle. It is then easier to see when the target touch the circle. With thicker walls, you can accidentally hide some of the target behind the circle without noticing it, with the result that you judge the distance to the target too far.
Summary
There is much to be gained by trying different circles untill the target looks good .
If you feel that you do not see the target clearly, it is difficult to achieve top results. Maybe you also have revealed that you should have been a trip to the optometrist ?
Some comments:
You say circle inserts, so I use the same Word here, or just circle.
R/J shooters = recruit and junior.
Long and short barrels. the Sauer 200 str comes With barrellengths from 67 - 74 mm. http://en.wikipedia.org/wiki/Sauer_200_STR
Fieldshooting: In Norway a highpower match has 5 targets on various distances from i.e 90 - 600 metres. The targets are out in the terrain, so the shooters must walk from position to position. On the shooting position, they must judge the distance to the target and adjust their sights. The targets have irregular shapes, and various sizes. The normal way of jugdeing the distance to the target is by using the sights. If you know how big a certain target is in your "circle" at i.e. 100 metres, then you can judge the distance by how many targets will fit in the circle. Experienced shooters are very good at this, and are dead on all the time. Smallbore matches are shot at 100 meters, by junior and old shooters.
Here we go:
How to use the sights, and how to choose the right frontsight insert.
This article was previously published in Norwegian Shooter Official Journal . Author is former national champion John Olav Ågotnes
Targetshooting – circle inserts
What kind of circle insert size is best to use is a topic often discussed among shooters with strong opinions.
I shall give some rules of thumb for selecting circle inserts.
Young shooters often use too small circle inserts. This may be because the "young eyes " have muscles that can better adapt the intensive focus. However, it is often you sees signs that R / J - shooters use too small circle inserts .
It is easier to decide when the target is in the center when only a small clearance between target and circle. This is also very demanding for the muscles in the eye.
R / J - shooters with small circles often find that they shoot significantly better in the first series of shots than in the later. .
Shooters who shoot standing, where movement of the weapon is clearly greater than in lower positions, often prefer small circles as it is " easier to decide ." (when to pull the trigger).
A rule of thumb is to have a circle that provides a coverage width that is twice as large as the target . With a long barrel, that will say about 4.0 mm at 2-300 meters . Similarly, for 100 meters will be about 4.8 mm, then the target at 100 yards is 20% larger . When the target is easier to see, the closer the comes, it will be more natural to use about 4.2 to 4.4 mm at 100 meters with a long barrel. ( short barrel minus 0.2 mm) Those who are used to small circles will initially feel it’s difficult with larger circles.
What is interesting is not what one feels but what the result in the target shows . It is also easier to see your mistakes and “pull outs” with a normal circle than with a small one. It looks worse but the results are often better. It must also be noted that
nearsighted people use generally slightly smaller circles and farsighted use generally slightly larger circles
What do the best use?
.
It is always wise to see what the top shooters use . After speaking
with the elite of Norwegian target shooters , most use from 4.0 to 4.5 at 2-300 meters.
Wall thickness: The rule of thumb for thickness is 1/ 3 of the circle diameter.
I.e. from 3.6 - 1.2 and 4.2 - 1.4 . There is also much to be gained from switching circles under different light conditions . With the sun in the back and strong sunshine on the target, there will be an advantage with smaller circles with thicker walls.
Thicker walls offers better contrast. Similarly, if shooting in misty and cloudy weather, larger circle with thinner walls.
Choosing diopter hole.
Those who use weapons with Busk sights know that you can choose from six
different diopter holes . Only the three smallest should be used , because they provide diopter effect .The three largest is a peep sight.
Diopter effect.
When the diopter hole is about 1.2 mm or less, it provides the diopter effect.. Everything we see through the hole is then clear. For example , we see the circle
and target sharply simultaneously. Same principle as in photography. Using small aperture makes the image sharp in depth. Using the peep sight we must focus from circle to target constantly.
Another thing one should be aware of with peep sights is to have the circle in the middle of the rear sight to avoid different point of impact from shot to shot. The same applies to those who use variable iris aparture. The diopter effect disappears at about 1.2 mm. Bright light on the target can also be countered with color filters . Whether the color filter in iris or colored glass in spectacles . Gray or brown glass then gives the best effect. In hazy and cloudy weather many prefer a yellow glass / filter . Be aware that even if the contrast is improved somewhat, yellow glass filter away about 15 % of the light .
Fieldshooting
Unlike target shooting, one should use the same circle throughout the fieldshooting season . This is because two circles rarely provides the same POI, and in fieldshooting you have no test shots to correct for POI before shooting.
The template is here from 2.8 mm to 3.4 mm on both highpower and smallbore matches. In a highpower match, where one must judge the distance using coverage width of the circle ,it is advantageous to use a circle with as thin walls as possible, without loosing the clearness of the circle. It is then easier to see when the target touch the circle. With thicker walls, you can accidentally hide some of the target behind the circle without noticing it, with the result that you judge the distance to the target too far.
Summary
There is much to be gained by trying different circles untill the target looks good .
If you feel that you do not see the target clearly, it is difficult to achieve top results. Maybe you also have revealed that you should have been a trip to the optometrist ?
