A topic from the ASSRA Match Scores forum, under the subject "Stars & Stripes Schuetzen Range - Spokane, WA 2024" where:

Schuetzendave wrote on Jun 30^th, 2024 at 3:41am:

How would a brighter target (more sunlight on it) require a higher point of aim?

(unless we're also adding mirage to the situation)...

I have read that this is really only an big issue with a 6 o'clock hold with a post front sight as the bull appears larger.  That said, I did an experiment one that I plan to repeat where I set up a targetspot scope on a tripod and aimed it at a point on my neighbors house and recorded the crosshair's position under different lighting conditions.  It wandered all over the place.  I need to repeat the test but not look through a window.

bohemianway wrote on Jul 6^th, 2024 at 6:58pm:


See above.
Quote:

A.G. Banks did the test for aperture sights in difference light conditions.  Left, right, much, little.  His conclusion was that there is no difference with aperture front and rear.   Even put the different targets as proof.

Why did this post go to the archives? which I recovered.

Don’t know his name but he’s absolutely correct changes in ambient light will affect elevation settings arpeture  rear post font. Have proven it to my self many times on Silhouette targets were I always use post and bead.

Arpeture - Arpeture when I shot Smallbore prone ambient light changes also affected point of impact, however to my eye lack of precision not a bias one way or the other.

Teaching my 16 year old grandson offhand,  arpeture rear post and bead front, iron sights 200 yard gongs now. Early lesson, every shot waiting for your turn open the rear up. Just before his turn close it until the front is in sharp focus. Then break the shot. His comment “wow that works” 

Boats

I learned most of what I stated from a highly qualified High Power shooter, in the '80's. High Power shooters, shoot 3 position, from 100 - 600 yards, regularly and use high end, iron aperture sights.

You'll have a hard time trying to re-educate them on light and how to adjust for it. They are a VERY competitive group of shooters.

My Anschutz sights have the finer 1/10 MOA adjustments on my Schuetzen rifle and their precision adjustments for light with an adjustable rear iris has won me many benchrest competitions.
Lones Wigger also used the Anschutz front and rear sights when he won the 1995 and 1999 International Schuetzenfest Benchrest Championship and that is why I have used them ever since 1996 for my Schuetzen competitions.

Even my Burris scope had 1/8 MOA adjustments and also had an adjustable internal iris to balance light variations which even helped me win scope benchrest competitions as well at early dawn or late dusk light conditions.

It ussually requires at least two clicks of elevation adjustment for a light change to correct for the change in point of aim due to the changed light reflection from the change in light intensity.

The adjustable rear iris changes the balance of light and helps change the focus from the target to the front sight which affects your eye's ability to better concentrate on centering the target in the aperture.

Light changes during the competition are ussaully met with a sight adjustment to compensate for change in POA and do not require a rebalancing of the light coming through either the front or rear aperture.

You adjust the front aperture size at the start of the shoot and balance the light as well as focus your sights with the rear adjustable rear iris. 
You rarely adjust with changes to light conditions by adjusting your rear adjustable aperture to maintain the correct light balance unless you start getting glare or there is a major change in light intensity at dawn or dusk.

Unfortunately for some you can lead the horse to water but you cannot make him drink.
Best to listen to the advice of those who have won major shooting comptitions.

MartiniBelgian you are contradicting the advice of Lones Wigger the most recognized shooter and most acclaimed shooter in the World.

Lones Wigger in 2008, was inducted into the U.S. Olympic Hall of Fame as well as the U.S. International Shooting Hall of Fame. 
Wigger was selected by the United States Olympic Committee in 1996 as one of the 100 Golden American Olympians — an honor bestowed on the 100th year of the modern Olympics.

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It amazes me how many shooters don’t really know how to adjust the sights at all. Our 200 yard offhand gong SShot matches are shot 6 man squad. 3 shooting 2 on spotting scopes marking strikes with individuals colored push pins 3rd running the  score card.  Then repaint and switch off, spotting board has a perfect record of your 10 shots and the other two as well.

Will often see a shooter miss or get hits on the edge same spot high or low and never make a correction or worse never look at the spotting board. The Ram is wide, windage not as important, but frequently see a shooter use half the Rams width rather than center up his shots. Target is big stay centered you have room to be a bit off and still get X.  Not centered more 0’s, it takes over 95% hits to win the match.

Drill I have used and am now using on my grandson is put the rifle on the shooting boxes rest. Tell the shooter “set on 47, now change to 50, give me a 42” etc. up and down the staff drilling fast accurate changes. This from my Silhouette days were my regular spotter and I would call out sight charges needed. All the shooter did was turn the knobs as directed. Spotter looking over his shoulder double checked corrections. We can’t do that in the gong matches, spotting board and more time to shoot makes up for spotter coaching.

Sights are expensive might as well use them correctly, after all they control every shot fired.

Boats

It is a team sport and spotter probably 40% of your score.  Couple of  buddy’s of mine and I had a good thing going but work got in the way & I could not be regular. Gave BPCS up, without good spotting it’s a waste of time 

Then found Schuetzen & Small Bore prone.  Both self spotted scope and sighter target real advantage. Use them   !

  Boats

The shooter has to buy the beer!

Must depend where you shoot, because I have received trophies and placks from several larger matches when my shooting partner does well…

Tom Klinger

I agree with Joe on that one. The shooter walks away with the prize and the spotter who helped make it possible got a pat on the back.  Of the few years I shot BPCR we had An  agreement to split the prize IF we ever got there ! LOL