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In this issue:
Re: Vision and Shooting
30 degree rule
Temperature and sight/rifle zero
Recommend SCUBA setup for a team
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> >Hi Michael,
> >
> >I would like to weigh in on the discussion concerning optics, sighting and
> >such.
Michael,
Thanks for sending such a great post! I've been subscribed to this list
for a short while and have had to wade through some of the garbage posted
while in search of helpful and meaningful info relative to International
Pistol. BTW, isn't it amazing how a keyboard and a connection to
the Internet brings all those so called "experts" out of their
closets? It seems to happen to every mailing list though.
In terms of Lt. Flatt's post, his explanation of visual problems and
solutions is excellent, and it dovetails nicely with what my eye doctor has
done with me. While I am not a rifle shooter, much of his explanation applies.
I do have a question relative to this. I shoot pistol and am now in
bifocals. For some years, I could clear up my vision with the use of an
iris, but I recently decided to give positive correction lenses a try. My
doctor and I worked up four lenses, my correct prescription (which gets me
to 20/15), a +.25, a +.50 and a +.75. In testing these lenses with my air
pistol and free pistol on the correct targets at the correct distances in
and outside his office, I could see the front sight perfectly (.25 for AP
and .50 for FP) with an acceptably clear rear notch and a slightly blurred
target. At least that's what happened in his office (AP) and outside his
office (FP).
I have attempted to use these same lenses on the range where I compete, and
they are not working nearly as well for me. The indoor range is somewhat
dark overall but there is good fluorescent light over every point, and the
outdoor range has a large roof so it, too, is darker than how I first
tested these lenses.
In reading Lt. Flatt's post, I'm wondering if the darker lighting
conditions are most likely the cause of my reduced visual performance with
the new lenses. And, if that's the case, what is the easiest solution in
terms of filters, etc? I use Knobloch glasses, so I can try some things there.
I would appreciate any suggestions that have proven successful for other
pistol shooters.
Stan
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How does an observer tell if someone is lower than 30 deg.
One of our coaches is of the opinion that lower is better
but in my opinion his pupils are way too low.
A 30 deg triangle at ground level is not accurate because the jacket hides the relevant bits.
Would a measurement from the ground to the wrist bone and a bit of basic triganometry be better?
Regards,
Gerald.
[Editor - I've not found a triangle to be a problem. I can always see where the elbow
and wrist are. I note that judges at WCs seem to do something similar
except at a distance from behind the line. They hold up a template, which
seemed similar to a triangle, and eyeballed down the line.
In general, lower is better though as some have pointed out high positions
can be successful as well (eg, Prone Gold in Sydney).]
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This is a very interesting post. It clearly indicates that temperature has
effect on the athlete shooting abilities in differing temperature ranges.
For this reason I advise all my athlete to bore sight the competition rifle
or pistol the day before the competition as the starting point for the three
sighters taken in competition. Remember always sight for twice the distance
of intended competition. Of course if the sights are not adjustable then
there is no help.
Posted by Ben Fok on August 15, 2001 at 14:24:16:
Hi folks:
Yesterday I was shooting my PH6 at the range. It was a cool day(~75F). I had
my rifle sighted in a few weeks again what it was very hot(90F)
All of my settings are off from 1/4" to 1". At 25 yard, I am off by 1/2".
My question is, what is the best way to compensate for such a error? I am
sure it is not my shooting and I am sure it is not my rifle. The only
variation is the air in the tank. I did have to refill at the range so I
expect some temperature difference before and after I fill.
If I have to carry around a thermometer to the range to compensate such
error I am willing to do that. I am interested in any other ideas.
Thanks,
Ben
Chet Skinner, Coach
Entity Sports International
http://www.geocities.com/colosseum/dome/4512/index.html
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I have held off as long as I could on CA, but will need to break down as I'll have some recruits with their own CA guns coming to our school in a couple years. I've seen many mention 80 cu ft tanks as being a good size, but I'm guessing that is just for them or a couple people, not a team of 10 (rifle).
So what are typical sizes other than 80 cu ft? Steel or AL? I need to include all this in next year's budget so feel free to give me prices on the adapters, yokes, regulators, etc that I'll need to refill ALL brands of air rifles.
I'm figuring I would do a cascade system as well so I'd get 2 of everything.
Michael Ray
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End of UIT Mailing List #25
Michael Ray - DBA & Systems Engineer
Rose-Hulman Inst. of Tech. Rifle Coach
UIT Shooting Page -
http://www.geocities.com/Colosseum/1190/index.htm
