Do any of you with variable power second focal plane scopes w/ mildots use your power settings to estimate range? I don't see much discussion of this.
Rifle Scopes Range estimation using zoom
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Re: Range estimation using zoom
I use mine like that. My 6-18x Nikon Buckmasters MD is cald. for 12. At 18 it's 66% smaller at 2.4 IPHY, so the "multiplier" in the mil-ranging formula becomes 41.67 (100/2.4). Rangefinding is more accurate at a higher power.
This may not be the same system that you're talking about tho. If u mean same tgt. size and calculating powers that add up to even hundred yd. intervals or whatever (like the Leupold RES system) i don't do that. That would take too much time IMO to calculate a system, try to hold the gun steady while bracketing said tgt. between stadia, and then getting out of position to read power and consequently ydge. IMO, it's better to remember the multiplier then run a calculator. Or have your spotter do it for u. I'm a hunter so my system is precalcd. anyways, and on a sticker in my Butler Creek Blizzard-style objective cover.
I use mine like that. My 6-18x Nikon Buckmasters MD is cald. for 12. At 18 it's 66% smaller at 2.4 IPHY, so the "multiplier" in the mil-ranging formula becomes 41.67 (100/2.4). Rangefinding is more accurate at a higher power.
This may not be the same system that you're talking about tho. If u mean same tgt. size and calculating powers that add up to even hundred yd. intervals or whatever (like the Leupold RES system) i don't do that. That would take too much time IMO to calculate a system, try to hold the gun steady while bracketing said tgt. between stadia, and then getting out of position to read power and consequently ydge. IMO, it's better to remember the multiplier then run a calculator. Or have your spotter do it for u. I'm a hunter so my system is precalcd. anyways, and on a sticker in my Butler Creek Blizzard-style objective cover.
Re: Range estimation using zoom
I use it for rough estimates on deer. A deers chest is about 18"
The mils on my scope are correct at 10 power. So if I bracket
18" in 2 mils the range is 250 yards with the scope on 10x.
.5yds x 1000
________________= 250
2 mils
So then if I bracket 18" and my scope reads 9x the range would be 250 x 9/10 or 225 yds. At 20x range = 250 x 20/10 or 500 yds. Therefore,it's pretty quick to zoom on a deer untill 2 mils brackets his chest,read the power setting(x10) and divide it by 4 to get the yards. Using this my 6 x 20 scope will range from
150 to 500 yards. Or I can bracket the 18" in 1 mil,divide the power setting(x10)by 2, and the same scope will range from 300
to 1000 yds. Works pretty good and I don't have to get out a calculater when I see a deer.
I use it for rough estimates on deer. A deers chest is about 18"
The mils on my scope are correct at 10 power. So if I bracket
18" in 2 mils the range is 250 yards with the scope on 10x.
.5yds x 1000
________________= 250
2 mils
So then if I bracket 18" and my scope reads 9x the range would be 250 x 9/10 or 225 yds. At 20x range = 250 x 20/10 or 500 yds. Therefore,it's pretty quick to zoom on a deer untill 2 mils brackets his chest,read the power setting(x10) and divide it by 4 to get the yards. Using this my 6 x 20 scope will range from
150 to 500 yards. Or I can bracket the 18" in 1 mil,divide the power setting(x10)by 2, and the same scope will range from 300
to 1000 yds. Works pretty good and I don't have to get out a calculater when I see a deer.
Re: Range estimation using zoom
plenty of brain damage going right here.......and it seem the hungry may not survive
the search function may be of some help
plenty of brain damage going right here.......and it seem the hungry may not survive
the search function may be of some help
Re: Range estimation using zoom
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: coondog</div><div class="ubbcode-body">Sorry you hurt your brain.</div></div>
oh....no worries
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: coondog</div><div class="ubbcode-body">Sorry you hurt your brain.</div></div>
oh....no worries
Re: Range estimation using zoom
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: coondog</div><div class="ubbcode-body">
.5yds x 1000
________________= 250
2 mils
</div></div>
The only problem I see with the zoom formula is accurately reading the power scale on the scope. Like it says 10x but it might be 9.2, 9.5, 10.3..who knows; it would be a good estimate at best IMO.
I like that formula though; would be simple math for 36" waist to head size target, just 1 yd over mils then move the decimal 3 places.
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: coondog</div><div class="ubbcode-body">
.5yds x 1000
________________= 250
2 mils
</div></div>
The only problem I see with the zoom formula is accurately reading the power scale on the scope. Like it says 10x but it might be 9.2, 9.5, 10.3..who knows; it would be a good estimate at best IMO.
I like that formula though; would be simple math for 36" waist to head size target, just 1 yd over mils then move the decimal 3 places.
Re: Range estimation using zoom
Thanks SSCoyote. Yes they are. GCMxVeGeTa what I did was set up
stakes in the ground with 36" marked on them at the different
distances I needed and "calabrated" my scopes by scratching a
mark on the power ring when the mils read correctly for the distance and power setting. I first did this to see exactly where
10x was because my Ziess' mildots are calabrated for that,and like you say,if it says 10x and it's really 9.5 or 10.3 then your gonna be off reading mils and doing the math the regular way anyway.Then after I came with this system I did all the power settings. I know this is not as good as a laser rangefinder but for me its fast and pretty accurate. And yes you
can work out a system for any known target height.For scopes calabrated at 10x the system works best if your target height is
18",36",or 72". On these target heights you would divide the
power setting(x10) by 4,2,or 1 respectfully.(using 2 mils to bracket the target) You can also play with the number of mils
you use to bracket the target to come up with a formula that would work for your scopes magnification range and/or distances
you wanted to be able to range.
with how many mils you use to bracket
Thanks SSCoyote. Yes they are. GCMxVeGeTa what I did was set up
stakes in the ground with 36" marked on them at the different
distances I needed and "calabrated" my scopes by scratching a
mark on the power ring when the mils read correctly for the distance and power setting. I first did this to see exactly where
10x was because my Ziess' mildots are calabrated for that,and like you say,if it says 10x and it's really 9.5 or 10.3 then your gonna be off reading mils and doing the math the regular way anyway.Then after I came with this system I did all the power settings. I know this is not as good as a laser rangefinder but for me its fast and pretty accurate. And yes you
can work out a system for any known target height.For scopes calabrated at 10x the system works best if your target height is
18",36",or 72". On these target heights you would divide the
power setting(x10) by 4,2,or 1 respectfully.(using 2 mils to bracket the target) You can also play with the number of mils
you use to bracket the target to come up with a formula that would work for your scopes magnification range and/or distances
you wanted to be able to range.
with how many mils you use to bracket
