49willys
Member
been searching on this to no avail.is it possible to use a moa scope to figure target size when distance to target is also unk own?
figuring target size when distance is also unknown?
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rcmodel
Member in memoriam
A MOA scope?
No.
But I don't know what you mean by MOA scope though???
You can't use anything to figure target size if target size & distance are unknown.
Best you can do is use your brain to figure what you think the target size should be.
And the range should be.
Or use an electronic range finder to find the exact range.
Then use your brain to figure out how big you think the target should be at that range.
The only problem is, in hunting, there are 100 pound deer, and 300 pound deer.
Or in war, 5' 3" humans, or 6'11" humans.
No scope or range finder can tell you the size of an unknown size target at an unknown range though.
Military snipers would use known sizes of vehicles, wheels, weapons, prior engagements in the same place, etc, with Mil Dot scopes to get pretty darn close though.
rc
No.
But I don't know what you mean by MOA scope though???
You can't use anything to figure target size if target size & distance are unknown.
Best you can do is use your brain to figure what you think the target size should be.
And the range should be.
Or use an electronic range finder to find the exact range.
Then use your brain to figure out how big you think the target should be at that range.
The only problem is, in hunting, there are 100 pound deer, and 300 pound deer.
Or in war, 5' 3" humans, or 6'11" humans.
No scope or range finder can tell you the size of an unknown size target at an unknown range though.
Military snipers would use known sizes of vehicles, wheels, weapons, prior engagements in the same place, etc, with Mil Dot scopes to get pretty darn close though.
rc
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OP
OP
49willys
Member
ok,thanks.
jwrowland77
Member
As far as target size, you'll just have to take a guess.
Then of course use you scope to range it with the MOA lines on whatever power it has to be on
Then of course use you scope to range it with the MOA lines on whatever power it has to be on
243winxb
Member
Not sure what you mean, but the REDFIELD Vintage Accu-Range Hunting Rifle Scope back in the 1960 had a built in range finder. If i remember correctly, 2 lines were place on the top and bottom of a deers body, then you could read the yardage. Looked like this >
The military used one i think?? Never used one. See post #11 here > http://m14forum.com/optics/114105-redfield-3x9-scope-military.html
The military used one i think?? Never used one. See post #11 here > http://m14forum.com/optics/114105-redfield-3x9-scope-military.html
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1911 guy
Member
I wasn't a sniper. But I knew a couple and they mentioned the fact that passenger cars in our AOR had an almost universal size of (IIRC) 13" wheels. They used this to find range on other items near cars. Also, 8" and 12" blocks are commonly used in many parts of the world. Knowing the size of common items can be used to range them and, if the target is near that item, use this range for first shot on the target.
RetiredUSNChief
Member
If you don't know range, then the only recourse you have is relative size comparison with other known objects in the vicinity.
Hummer70
Member
Do some surfing for articles about "using mildot reticle to determine range"
That will give you an idea of how it is done now.
There are some spotting scopes that have this system in them.
That will give you an idea of how it is done now.
There are some spotting scopes that have this system in them.
berettashotgun
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Kill zone on a deer is about 17" - don't matter how much he weighs.
Pretty constant for the normal world to 500m.
Pretty constant for the normal world to 500m.
First, you need some exact figure for something relative to the target if you want to be precise enough to hit where you aim.
I'd use a split image (coincident) optical rangefinder to find their range within one or two yards.
http://www.dreadnoughtproject.org/tech/essays/Rangefinders/challenge/images/AlbieRangetaking.jpg
Animals don't have reflectors on them so laser rangefinders won't work. Maybe if you could keep one aimed in their eye pupil, their retina may reflect back a good signal.
Then fix your scope in a solid postion, click the reticule from one point to the other, count the clicks for some distance across the target then calculate how far they traveled across the target.
I'd use a split image (coincident) optical rangefinder to find their range within one or two yards.
http://www.dreadnoughtproject.org/tech/essays/Rangefinders/challenge/images/AlbieRangetaking.jpg
Animals don't have reflectors on them so laser rangefinders won't work. Maybe if you could keep one aimed in their eye pupil, their retina may reflect back a good signal.
Then fix your scope in a solid postion, click the reticule from one point to the other, count the clicks for some distance across the target then calculate how far they traveled across the target.
swag it Scientific Wild @*& Guess. A man is roughly 70inches. a dog is 12-28 use your judgement. Groundhog is 9-18 Stop signs are 7ft (a handy one) green metal fence posts are usually 6-8ft. A 6ft bed regular cab truck usually has a wheel base of 115-170inches. Cars are around 4 feet tall trucks around 6 to 6 1/2. A common outside door is 80inches. A telephone pole is usually 40ft long and burried 6ft down.
These are just objects I know the dimensions of offhand and can use to guess distance through a scope with mil dots or moa lines.
Edit-estimate size, estimate distance and adjust your scope as needed. thats really the only way.
These are just objects I know the dimensions of offhand and can use to guess distance through a scope with mil dots or moa lines.
Edit-estimate size, estimate distance and adjust your scope as needed. thats really the only way.
jwrowland77
Member
That's odd because I use my Leupold 1200i TBR all the time during deer season.
Specs says it'll do deer out to 800yd. I haven't had a chance to test that, but I know it'll do 500yd, because I ranges a deer at that last year using mine....and that was the side of the deer.
Those old Redfield "Accurange" scopes (post #5) were calibrated for 18" between the stadia lines. They claimed that that was a typical thickness of a deers body.
Yeah, you don't need reflective targets with todays laser rangefinders. Round bales work great for me in groundhog fields. I can also just point at a hillside and get readings that seen pretty accurate.
Laphroaig
Yeah, you don't need reflective targets with todays laser rangefinders. Round bales work great for me in groundhog fields. I can also just point at a hillside and get readings that seen pretty accurate.
Laphroaig
If modern lasers can range on soft targets like deer and elk, they're better than what I tried years ago. So I found this web site to prove me wrong.
http://www.bestrangefinderreviewsguide.com/
Thanks for the error alert.
http://www.bestrangefinderreviewsguide.com/
Thanks for the error alert.
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