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Old April 18, 2010, 10:56 PM   #1
Grof
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sighting rifle at 50yards

can someone help me here get idea how to do this , how to callculate clicks
(I have bushnell 4200 and it's 1/4 click).
I know @ 100 yards if I am off 2" it's 8 clicks, how many is at 50 yards can someone explain this. I want to sight it zero at 200 yards.
thanks.
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Old April 18, 2010, 10:59 PM   #2
arizona98tj
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You would double the clicks for 50 yards. In other words, a click at 50 yards will only move your point of impact by 1/8" vs the 1/4" change at 100 yards.
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Old April 18, 2010, 10:59 PM   #3
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Deleted...slow

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Old April 18, 2010, 11:37 PM   #4
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Thanks Arizona98tj, so if I double the clicks it will give me same results on 100 yards, now I have Idea how this works.

Beentown71 ,Thanks also I am not expert just trying to get some help from people who know more than I do. great help
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Old April 18, 2010, 11:49 PM   #5
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I've always found that if I 'zero' at 50, I'm a bit high at 100 yards. I shoot some of the flatter-shooting calibers. I imagine this is due to height of the scope above the rifle. Thus I prefer about an inch low at 50, then I work on grouping at 100yds (this is where I evaluate ammo / reloads) and finally, a good zero session at the rifle's intended zero-yardage.
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Old April 18, 2010, 11:52 PM   #6
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Quote:
I want to sight it zero at 200 yards.
You need to keep in mind that just because you have your rifle sighted in, zeroed at 50 yards doesn't mean that it is zeroed in at 200 yards. You need to take into account bullet drop, and that varies from rifle to rifle, caliber to caliber, and load to load. You can get into the ballpark zeroing at 50 yards, but there's no substitute for actually sighting in at the desired range.
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Old April 19, 2010, 12:20 AM   #7
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thanks guys,
I just want to come close at 50 yards and than move to 100 yards and have it there 1-2" high so I am good for any range from 50-200 yards
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Old April 19, 2010, 01:23 AM   #8
javven
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Usually the MFG will publish velocity for a load somewhere. Take that and the BC / SD values from the manufacturer of the bullet to calculate your bullet drop. You can do this either with MFG table / published data OR you can use one of many online programs to do this.
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Old April 19, 2010, 06:05 AM   #9
rshanneck2002
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Go to the Remington website and download Remington Shoot,it will give you very good basics of bullet impact at various ranges. Have used it for several cal. for several yrs., if they still have it on there. Its very simple to use and covers just about every american cartridge, also euro cals.
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Old April 19, 2010, 10:07 PM   #10
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Use this. Change values to get what you need.

http://www.handloads.org/calc/index.html
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Old April 20, 2010, 01:12 PM   #11
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16 clicks

That oughta get you over 2" at 50 yds. But......if I wanted a 200 yd zero, I'd sure try and shoot at 200.

That said, I don't have access to a 200 yd range w/ a bench. My std drill is to zero all my full size deer rifle ctgs 2" high at 100. That puts me a tad low at 200, but keeps the bullet closer to the line of sight at intermediate ranges.

The old 3" high at 100 puts the bullet to high at midrange to suit me.
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Old April 20, 2010, 07:21 PM   #12
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You'll need a lot of data to be sure that where you hit at 50 is going to have you zero at 200. MV, BC, sight height, barrel length...

Calculators will get you close, but you'll just have to go out and shoot to figure it out.
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Old April 20, 2010, 08:11 PM   #13
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Grof,

Wasn't sayin you were slow. Just my connection. Good luck and sorry for the mix up.

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Old April 21, 2010, 05:22 PM   #14
Grof
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no worrys somethimes I am to slow or to fast.
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Old April 22, 2010, 12:14 AM   #15
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Sight in at 25yds. Check at 100yds. Finish sighting a 200. If you want it sighted in at 200yds, then move it to 200, otherwise you will be guessing. For my flat shooting stuff, I sight at 200, otherwise, I use 100.
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Old April 22, 2010, 07:16 AM   #16
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So, your scope is calibrated to 1/4 of a minute of angle... (MOA)

At 100 yards each click will move the point of aim 1/4" (4x.25"=1")
(this is how you get the 8 clicks equals 2" at 100 yards)

One minute of angle at 50 yards is equal to 1/2". That's the best way to think about it... (So to move the point of aim/impact 1" you need 8 clicks)

One minute of angle at 25 yards is equal to 1/4"
(to move the point of aim/impact 1" you need 16 clicks)

One minute of angle at 200 yards is equal to 2"
to move the point of aim/ impact 1" you need 2 clicks)

it depends on the caliber of round you are firing as to how much drop, if any you might get between 50 and 200 yards... it could be close to zero, which is what I think you are thinking.
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Old April 22, 2010, 05:19 PM   #17
Grof
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blume 357,
well explained , thanks
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