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Posted: 5/22/2005 6:21:20 AM EST
Guys,

I have two ARs I'd like to sight for 100m (really 100yds) target shooting; an Oly PCR5 Carbine and a Colt SP1 with A1 sights.

I can get both dead-on when sighting at the 25m range. But when I start shooting at 100yds, I can't hit paper. POI is way high. Just to get on the paper at that range I have to damn near spin the front sights out of the sight base. It's worse on the Oly, which has A2 sights.

Someone please tell me what I'm doing wrong. All I want to do is be able to shooting accurately beyond 25 stinking meters!

Thanks,
Link Posted: 5/22/2005 6:28:21 AM EST
How high is way high? like 5 inches? if so thats where it shouldbe with a 25m zero when shot at 100. Try zeroing it at 50 yards than going out to 100 it shouldn't be more than 2.5 inches high at that point. Or since you know your shootng high just start bringing the front sight up to lower the impact of the bullet.
Link Posted: 5/22/2005 6:43:31 AM EST

Originally Posted By photoman:
How high is way high? like 5 inches? if so thats where it shouldbe with a 25m zero when shot at 100. Try zeroing it at 50 yards than going out to 100 it shouldn't be more than 2.5 inches high at that point. Or since you know your shootng high just start bringing the front sight up to lower the impact of the bullet.



+1

I ZERO all mine to be dead on at 50yards, itll be a lil high at 100yards, but should be dead on at 200yards (or so the theory goes) lol.
Link Posted: 5/22/2005 6:45:42 AM EST
[Last Edit: 5/22/2005 7:03:50 AM EST by theshootersden]
Are you zeroing the rifle in at 25 meters useing the small hole aperture? After the rifle is zeroed, targets 0-200 yards use the large hole aperture, targets 300 yards and beyond, use the small hole aperture.
Link Posted: 5/22/2005 6:55:24 AM EST
Heres a bit of info about sighting in the AR

www.ar15.com/content/guides/sightIn/
Link Posted: 5/22/2005 7:03:45 AM EST

Originally Posted By theshootersden:
You need to zero the rifle in at 25 meters useing the small hole aperture. After the rifle is zeroed, targets 0-200 yards use the large hole aperture, targets 300 yards and beyond, use the small hole aperture.



Why do that he's looking for a 100 yard zero, use what ever ap your going to use for the vast majority of the shooting and zero with that ap. he's just trying to get it on paper. A 25m zero is pointless now anyways. makes things more complecated than they have to be IMO when it comes to shooting at extended ragnes and knowing what the hold over is.

Link Posted: 5/22/2005 7:05:07 AM EST
[Last Edit: 5/22/2005 7:23:53 AM EST by theshootersden]

Originally Posted By photoman:
Why do that he's looking for a 100 yard zero, use what ever ap your going to use for the vast majority of the shooting and zero with that ap. he's just trying to get it on paper. A 25m zero is pointless now anyways. makes things more complecated than they have to be IMO when it comes to shooting at extended ragnes and knowing what the hold over is.



ok, I understood him as wanting to hit his target anywhere from 25 meters and beyond.
Link Posted: 5/22/2005 7:50:12 AM EST

Originally Posted By theshootersden:

Originally Posted By photoman:
Why do that he's looking for a 100 yard zero, use what ever ap your going to use for the vast majority of the shooting and zero with that ap. he's just trying to get it on paper. A 25m zero is pointless now anyways. makes things more complecated than they have to be IMO when it comes to shooting at extended ragnes and knowing what the hold over is.



ok, I understood him as wanting to hit his target anywhere from 25 meters and beyond.



I actually get on paper at 25yards and then fine tune out at 50yards, maybe that is why he was at 25yards.


Im actually confused, is it YARDS or METERs that ppl are tryin to site in at. I personally use Yardage as my measurement.
Link Posted: 5/22/2005 7:51:39 AM EST
Just get optics and sight in at 100 yards.
Link Posted: 5/22/2005 8:43:00 AM EST
[Last Edit: 5/22/2005 8:48:27 AM EST by theshootersden]

Originally Posted By die-tryin:
I actually get on paper at 25yards and then fine tune out at 50yards, maybe that is why he was at 25yards.


Im actually confused, is it YARDS or METERs that ppl are tryin to site in at. I personally use Yardage as my measurement.



I sight in useing yardage when zeroing hunting/target rifles. When sighting in my combat/battle rifles I use millitary spec meters. 25 meters is slightly over 82 feet. 82.025 to be exact
Link Posted: 5/22/2005 8:48:35 AM EST
[Last Edit: 5/23/2005 3:32:05 AM EST by photoman]

Originally Posted By theshootersden:

Originally Posted By die-tryin:
I actually get on paper at 25yards and then fine tune out at 50yards, maybe that is why he was at 25yards.


Im actually confused, is it YARDS or METERs that ppl are tryin to site in at. I personally use Yardage as my measurement.



I sight in useing yardage when zeroing hunting/target rifles. When sighting in my combat/battle rifles I use millitary spec meters. 25 meters is slightly over 80 feet.



Yup.

I sight in my ARs at 50 yards, which give a crossover at 200 meters, or 220yards(actually it's 218. a bunch of other numbers). nice flat trajectory. I do the same with my AK as I was advised it would work similarly. Seems to work for the AK as well so hey I'm happy.
Link Posted: 5/22/2005 8:49:24 AM EST
Yeah, the 50 YARD IBSZ will get you on again at 220 METERS with 62gr green tip out of an M4. No more than a + or - of 2 inches from line of sight.
Link Posted: 5/22/2005 9:02:23 AM EST
[Last Edit: 5/22/2005 9:03:21 AM EST by theshootersden]

Originally Posted By photoman:

Yup.

I sight in my ARs at 50 yards, which give a crossover at 200 yards, or 220meters. nice flat trajectory. I do the same with my AK as I was advised it would work similarly. Seems to work for the AK as well so hey I'm happy.



Thats the way I do my reflex sights (C-MORE and Eotech). At 50 yards im dead zero, at 25 feet im an inch and a half low from zero. Anything over 50 yards, im useing my irons.
Link Posted: 5/22/2005 9:20:51 AM EST
[Last Edit: 5/22/2005 9:22:58 AM EST by Wetterman]

Originally Posted By theshootersden:

Originally Posted By die-tryin:
I actually get on paper at 25yards and then fine tune out at 50yards, maybe that is why he was at 25yards.


Im actually confused, is it YARDS or METERs that ppl are tryin to site in at. I personally use Yardage as my measurement.



I sight in useing yardage when zeroing hunting/target rifles. When sighting in my combat/battle rifles I use millitary spec meters. 25 meters is slightly over 82 feet. 82.025 to be exact



82.021 to be exact (27.34yrds)
Link Posted: 5/22/2005 9:27:20 AM EST

Originally Posted By Wetterman:

82.021 to be exact (27.34yrds)



Hmmm, try this to calculate the figures, www.metricconversions.net/meterstofeet.php
Link Posted: 5/22/2005 9:32:18 AM EST
[Last Edit: 5/22/2005 9:34:05 AM EST by ISED8U]
Being about 1.5-2.0 inches low at 30 yards should put you very close to zero at 100 yards. Good luck.
Link Posted: 5/22/2005 9:57:52 AM EST

Originally Posted By theshootersden:

Originally Posted By Wetterman:

82.021 to be exact (27.34yrds)



Hmmm, try this to calculate the figures, www.metricconversions.net/meterstofeet.php



That conversion is wrong.
1 inch is 25.4mm(0.0254meters). 25m/0.0254m= 984.25" = 82.021ft

www.convert-me.com/en/convert/length <- there is a good site for conversions.
Link Posted: 5/22/2005 10:05:56 AM EST

Originally Posted By Wetterman:

Originally Posted By theshootersden:

Originally Posted By Wetterman:

82.021 to be exact (27.34yrds)



Hmmm, try this to calculate the figures, www.metricconversions.net/meterstofeet.php



That conversion is wrong.
1 inch is 25.4mm(0.0254meters). 25m/0.0254m= 984.25" = 82.021ft

www.convert-me.com/en/convert/length <- there is a good site for conversions.





Ive got you both....
25 meter = 82.0209974 feet to be EXACT, but Wetterman is closer.

this is the best site I have found... as an engineer, I use it regularly at work.

www.onlineconversion.com

Its got BMI calculations for christ sake.
Link Posted: 5/22/2005 10:08:11 AM EST
Here's a link to a FREE conversion program for your computer, I've been using it for years.

Convert
Link Posted: 5/22/2005 10:10:28 AM EST
Link Posted: 5/22/2005 10:24:15 AM EST

Originally Posted By photoman:
I sight in my ARs at 50 yards, which give a crossover at 200 yards, or 220meters. nice flat trajectory. I do the same with my AK as I was advised it would work similarly. Seems to work for the AK as well so hey I'm happy.



I believe that you got METERS and YARDS reversed. 200 METERS = 220 YARDS, or pretty close.



Lonny
Link Posted: 5/22/2005 10:56:04 AM EST

Originally Posted By ISED8U:
Being about 1.5-2.0 inches low at 30 yards should put you very close to zero at 100 yards. Good luck.



Aha! Thanks for all the replies but this is the simplicity I'm looking for. Awesome!
Link Posted: 5/22/2005 12:06:39 PM EST

Originally Posted By Wingman26:
Here's a link to a FREE conversion program for your computer, I've been using it for years.

Convert



Thanks Wingman, i'll give that software a try now that I know what I was useing before isnt calculating accurately.
Link Posted: 5/22/2005 6:51:04 PM EST
You want simple...heres simple
at 25Yds you will be 2.5" low (Zeroing at 50 yds)
at 50Yds dead nuts on
at 200Yds 2.5" High

All yards No meters. meters are only if your on a Military range using the 25 meter zero which will give you a 300 meter zero.
Link Posted: 5/23/2005 3:31:21 AM EST

Originally Posted By xcpd69:

Originally Posted By photoman:
I sight in my ARs at 50 yards, which give a crossover at 200 yards, or 220meters. nice flat trajectory. I do the same with my AK as I was advised it would work similarly. Seems to work for the AK as well so hey I'm happy.



I believe that you got METERS and YARDS reversed. 200 METERS = 220 YARDS, or pretty close.



Lonny




Thanks for the catch, I'll change that right now.
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