Do Your Numbers Ever Change after Sight In?

[Hotrodrockets]

Bored Rocket designer... day off.... time to experiment!

A quick plot here (for those with ADD).


Details / photos posted here
http://havegun-willtravel.weebly.com/su ... iment.html

[acorneau]

Nice write-up hotRod.

One question... you state, "Note how the Sun to Shade effects the POA Between 4: 56pm and 5:15pm as the target “Jumps” into the shadows."

Your pictures shows what looks to be a car window showing up in the 5:15pm and 5:30pm shots. Was this car/window there the whole time or did it appear between 4:56 and 5:15? I ask because all the earlier shots are cropped tighter and the last two shots are wider, so I don't know if it was there or not.

Secondly, and this would be more work on your part, could you crop all the pictures so the crosshairs are in the exact same spot from picture to picture? I think it would show the movement in a clearer fashion.

Either way, thanks for the experiment!

[Hotrodrockets]

Quick response while Im deep into other stuff...
-Car (Lincoln #3) Arrives approx 5:10pm. Sun if off to the far left of parking lot by that time.
-possibly I could crop photos differently . Depends on time.

I really need to do this at several distances and in varying conditions. I consider this an initial small scale test. I was suprised to get any results..
Next I think I will use a time lapse camera.

[boats]

Two ways to predict point of impact, calculation and observation. Both valid both used by savvy shooters.

Navigating it's the same fix position by calculation electronic and celestial most of the time. Cautious navigators check calculations with observation. In fact double check is required most ships. If the captain of the Costa Concordia had looked out the bridge window he would have seen he was too close to shore no matter what the electronics said.

Shooting targets it's the same whatever the calculation double check with bullet strike. If it's off its off no matter what your pre set sights say. Another reason your spotter is critical to success, it's a tremendous advantage allowed by the rule book. Use it.

Boats

[TDB]

Thank you all so much for such helpful information. I'm so glad to see the quality of discussion that my post has generated. I think this embodies the beauty of the forum and the joy/frustration with this sport.

I had no idea about how much of an effect the light reflection/position of the sun could have on perceived versus actual position of the animal. As far as I can tell, this effect might be what's causing me to shoot high. Normally, I have to come down a couple of clicks which would be consistent with the figures presented above: adjustments down a couple of clicks would be necessary to counteract the effects of the animal actually being lower in reality than it appears in the scope. Very very informative (and super interesting)!

Thanks again to everyone! Keep the comments coming!

[boats]

Lever"silhouette is different in that the targets are so much larger, you have more room for error . Other hand Iron sight is more sensitive to light than a scope. I still crank my elevation knob in Lever matches. I rarely turn the wind knob. That's ok C P R but I suspect I miss some,turkeys not centering up my shot,patterns.

It's harder to figure with more limited,spotting using binoculars.

Boats

[jloehle]

Brad,

This effect Is probably more apt at Jax than our Brunswick range. At our range the animals are in the shade for most of the match. Something we will have to look at, but I think that is true.

Joe

[Jerry G]

Joe, The 1,000 yd set-up I did was on a day that was overcast for much of the day. I think it all depends on the location of the sun compared to you and the target. The last 2 times I set up the experiment, I noted the sun's location at the time of the reading. The problem with establishing any rule-of-thumb is the location of the sun changes from week to week at any given hour and your location on the planet. I have set up looking north, looking south, and looking southwest. The target follows the sun.

Take your final sighters on the animal you are going to start on and then depend on your spotter for good calls as the match progresses. Be aware of the light effect and then you will understand your spotter's calls if they don't match your sight settings from the late afternoon before the match. Don't over think it, just understand it. That's the best I can com up with.