how to 100 yd zero in a 20 yd range?

[glock7]

good morning calgunners. i have a question. how would one zero a scope to 100 yds if the indoor range is only 20 yds? there isn't an outdoor range nearby, but i will be going to one in a few weeks. i'd like to try and 100 yd zero(or as close as i can get) before i go out there and make slight adjustments when i go out. ideally i'd like to do a 25 yd zero, but i have to work with what i have. tia.

[ronas]

what caliber rifle?

[glock7]

Sorry it's a .223/5.56 AR 14.5 midlength. Plan is to shoot to about 2-300 yds. Thanks

[glock7]

Scope is 1x4

[glock7]

If I aim an inch lower would that give me my 25 yd zero? Sorry for the post whoring. I'm at work on my phone.

[CessnaDriver]

There is software you can use with a laser boresighter to print your own targets...

http://www.sitelite-lasers.com/products.php?PROD=BTS

[SuperSet]

Assuming 2.5" height over bore with XM193, zero at -1.6" at 20Y for a 100Y zero. Note that this is a rough zero and you should confirm at 100Y. At that close of a range, it will mask most of your shooting imperfections.

[ronas]

Assuming 2.5" height over bore with XM193, zero at -1.6" at 20Y for a 100Y zero. Note that this is a rough zero and you should confirm at 100Y.

That sounds about right.

I would determine the exterior ballistics for your load. The bullet maybe still be on the rise when it hits the target at 25 yards but drop back down by the same amount by the time it get to 100 yards. If that is the case I would determine the distance between the center of your bore and the center of your scope and shot that amount lower.

Then once on paper at 100 you can easily make adjustments.

[HighLander51]

Get your ballistic calculator here

http://www.remington.com/pages/news-and-resources/downloads/remington-shoot-software.aspx

[glock7]

Thanks folks you all have been very helpful. I will download those charts and when I go out to an outdoor range I'll use those figures to sight in. Just needed some guidance.

[penninger]

Thanks folks you all have been very helpful. I will download those charts and when I go out to an outdoor range I'll use those figures to sight in. Just needed some guidance.

Hey man I have the targets we use in the Army to zero our M4s at 25meters for 300meters. Send me your email address and Ill email one to you. Its makes it very simple just put 5 rounds into the circle at 25 meters and there you go, zeroed for 300 meters. And yes if works for scopes also. I have an ACOG on my M4, and this works great for zeroing that as well. Oh and anyone that says this wont work is crazy, this is a tried and true, tested method (in both Iraq and Afghanistan.)

[glock7]

Penninger I sent you an email. Thanks

[penninger]

Penninger I sent you an email. Thanks

Yeah no problem and if anyone else wants them just pm me or email me

[Leonidas_AS]

Yeah 25 yard BZO is good out to 200 yards atleast.

[penninger]

Yeah, there is no reason to get complicated with it. 5.56 will do most of the work for you, all you really need to do is watch your trigger pull and breathing. A BZO (a.k.a Battle Sight Zero) is all you need to engage targets at 300 to 500 meters.