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Rifles, Reloading, Optics, Equipment
Specialty Handgun Hunting
Long Range Handgun Anyone?
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<blockquote data-quote="sscoyote" data-source="post: 2167754" data-attributes="member: 1133"><p>Man can't believe i didn't see this. A number of years ago there was an article written by Ed Wosika entitled "How to Shoot Your Pistols Accurately at Extremely Long Range". Roger Clouser also wrote about it years ago in Precision Shooting publications. They were detailing the front sight applications for long range shooting like Elmer Keith used. When I read this stuff I was fascinated with the math behind it. I don't believe either writer detailed the math nor believed in first shot applications using it, but i started researching it years ago, and what a fun ride it's been. I don't shoot the semi's in straight-walled cartridges at all, but have used it with 3 air pistols and a Ruger Mk III 22 with amazing results. One of the airguns i've used is the diminutive Crosman 1377 pumper shooting a .03 BC pellet at 400 fps mv. What I did was paint a small white box section in the middle of the front sight to be able to establish a 3-unit system of subtension basically. I measured each unit with calipers, and the sight radius of the pistol's iron sights. The equation for MOA is front sight measurement x 3438 / sight radius. For milliradian use 1000 for the second variable instead of 3438 (i round off to 3400 since that margin of error is very insignificant with iron sights and it's much easier to remember). Once measured and calcd. I had 3 units that added up to right at 80 MOA trajectory compensation. I had to try it out so I set a 12" pie plate at 80 yds. once which was right at the bottom of the front sight (assuming a 20-yd. top of front sight even with top of rear sight zero). Had a 10 mphish 3 oclock wind that day which surprised the heckoutame that I could hit the plate several times after i aimed several feet into the wind at that distance.</p><p></p><p>Another time I was at Randy Engels airgun fun shoot he has every year not far from my home. I thought to pull out the gun to test it at 50 yds. on a 10" buffalo silhouette steel tgt. and after running the ballistics it called for ~1.4 units down for whatever the MOA correction called for at the range (been awhile now). At the first shot i heard a "tink" and about fell off my chair. I think i hit it maybe 3 out of 5 shots. It was great my ballistics were matching the MOA calcs I'd made.</p><p></p><p>One last time I thought to calc windage too, but this time I used a sight radius to my eye from a sitting position, and was able to hit a pebble on the side of a road bed at 40 yds. by aiming the calcd vertical and horizontal correction with the front sight according to the ballistic programs calcs. I was ELATED it worked so well. Love this stuff and the math behind it.</p><p></p><p>If you use the Keith aiming system though (put target on top of the front sight) you have to use a sight radius to your eye like windage. Try it sometime it might just blow your mind like it did mine</p></blockquote><p></p>
[QUOTE="sscoyote, post: 2167754, member: 1133"] Man can't believe i didn't see this. A number of years ago there was an article written by Ed Wosika entitled "How to Shoot Your Pistols Accurately at Extremely Long Range". Roger Clouser also wrote about it years ago in Precision Shooting publications. They were detailing the front sight applications for long range shooting like Elmer Keith used. When I read this stuff I was fascinated with the math behind it. I don't believe either writer detailed the math nor believed in first shot applications using it, but i started researching it years ago, and what a fun ride it's been. I don't shoot the semi's in straight-walled cartridges at all, but have used it with 3 air pistols and a Ruger Mk III 22 with amazing results. One of the airguns i've used is the diminutive Crosman 1377 pumper shooting a .03 BC pellet at 400 fps mv. What I did was paint a small white box section in the middle of the front sight to be able to establish a 3-unit system of subtension basically. I measured each unit with calipers, and the sight radius of the pistol's iron sights. The equation for MOA is front sight measurement x 3438 / sight radius. For milliradian use 1000 for the second variable instead of 3438 (i round off to 3400 since that margin of error is very insignificant with iron sights and it's much easier to remember). Once measured and calcd. I had 3 units that added up to right at 80 MOA trajectory compensation. I had to try it out so I set a 12" pie plate at 80 yds. once which was right at the bottom of the front sight (assuming a 20-yd. top of front sight even with top of rear sight zero). Had a 10 mphish 3 oclock wind that day which surprised the heckoutame that I could hit the plate several times after i aimed several feet into the wind at that distance. Another time I was at Randy Engels airgun fun shoot he has every year not far from my home. I thought to pull out the gun to test it at 50 yds. on a 10" buffalo silhouette steel tgt. and after running the ballistics it called for ~1.4 units down for whatever the MOA correction called for at the range (been awhile now). At the first shot i heard a "tink" and about fell off my chair. I think i hit it maybe 3 out of 5 shots. It was great my ballistics were matching the MOA calcs I'd made. One last time I thought to calc windage too, but this time I used a sight radius to my eye from a sitting position, and was able to hit a pebble on the side of a road bed at 40 yds. by aiming the calcd vertical and horizontal correction with the front sight according to the ballistic programs calcs. I was ELATED it worked so well. Love this stuff and the math behind it. If you use the Keith aiming system though (put target on top of the front sight) you have to use a sight radius to your eye like windage. Try it sometime it might just blow your mind like it did mine [/QUOTE]
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