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Rifles, Reloading, Optics, Equipment
Long Range Scopes and Other Optics
Leupold or Night Force
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<blockquote data-quote="LouBoyd" data-source="post: 860952" data-attributes="member: 9253"><p>By far the easiest way to see bullet holes on a black target is to rear illuminate the target. Assuming you're shooting paper on a cardboard backing you can place a white cloth (old bed sheet or towel) on the berm behind the target so your line of sight though the bullet hole is in line with the white cloth illuminated by the Sun. </p><p></p><p>That method works fine for me at distances up to a mile with a 16x40 scope for 7mm bullet holes. It doesn't matter whether the the scope is a Mk4 Leupold or a 16x40 SWFA SS for 1/4. I haven't tried it with more expensive scopes but I doubt any would make a significant improvement. </p><p></p><p>The diameter of the holes doesn't mater as long as the bullet holes are unobstructed so they're bright. magnification is only needed resolve the >spacing< of the bullet holes. Enough magnification to resolve the diameter of the hole is not required. It's like looking at a star in the sky at night. No visible star has an apparent diameter even close to 1 arcsecond. A normal human naked eye can resolve about 1 arc-minute. that's ~1" at 100 yards, so a 10x scope should resolve about 0.4" at 400 yards or 1" at 1000 yards. By resolve that means you can detect that it's not just one hole. Of course mirage (atmospheric scintillation) will reduce the resolution. The wavefront and image quality is distorted before it reaches the scope and no lens design will fix that. Active optics theoretically could, but no commercial rifle scope has that. </p><p></p><p>What's important is that a bright dot on a dark surface is far easier for the eye to detect than a black dot on a white surface or any other combination.</p></blockquote><p></p>
[QUOTE="LouBoyd, post: 860952, member: 9253"] By far the easiest way to see bullet holes on a black target is to rear illuminate the target. Assuming you're shooting paper on a cardboard backing you can place a white cloth (old bed sheet or towel) on the berm behind the target so your line of sight though the bullet hole is in line with the white cloth illuminated by the Sun. That method works fine for me at distances up to a mile with a 16x40 scope for 7mm bullet holes. It doesn't matter whether the the scope is a Mk4 Leupold or a 16x40 SWFA SS for 1/4. I haven't tried it with more expensive scopes but I doubt any would make a significant improvement. The diameter of the holes doesn't mater as long as the bullet holes are unobstructed so they're bright. magnification is only needed resolve the >spacing< of the bullet holes. Enough magnification to resolve the diameter of the hole is not required. It's like looking at a star in the sky at night. No visible star has an apparent diameter even close to 1 arcsecond. A normal human naked eye can resolve about 1 arc-minute. that's ~1" at 100 yards, so a 10x scope should resolve about 0.4" at 400 yards or 1" at 1000 yards. By resolve that means you can detect that it's not just one hole. Of course mirage (atmospheric scintillation) will reduce the resolution. The wavefront and image quality is distorted before it reaches the scope and no lens design will fix that. Active optics theoretically could, but no commercial rifle scope has that. What's important is that a bright dot on a dark surface is far easier for the eye to detect than a black dot on a white surface or any other combination. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Long Range Scopes and Other Optics
Leupold or Night Force
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