Iron sights ?

[Plank Road Farm]

I've read about and printed out ballistic charts for different calibers showing the scope mounted 1 1/2 inches above the barrel.
The chart usually shows where the bullet path crosses the line of sight through the scope in two places.
The first time it crosses the line of sight it is going up and the second time it is coming down.

My question is:
Where can I find a chart that shows the bullet arc when using iron sights?
So I can determine what minimun yardage to set my sight in my rifle.
And know what the range is when I hold dead on target.
There may not be one, but I thought I'd ask the experts.

TIA

 

[fireman 9731]

it should just be 1 1/2 inches lower than what the chart for a scope shows.

 

[Plank Road Farm]

Somehow that just does not seem right.

Because the iron sights are still above the line of sight.

Is it correct to think you can extrapolate the scope chart?

I guess an iron sight chart does not exist.

 

[Jason_G]

What rifle and what caliber are you shooting?

Jason

 

[mljdeckard]

Every rifle, load, bullet weight, velocity, etc will be different. With MOST iron sights, paralax is negligible. (Obvious exceptions being styles like the M-16.) Are you having a specific problem with something?

 

[Clint C]

I'm probably wrong here but in my mind it would be the same between iron sites and a scope.

Lets say you zero a rifle scope at 200 yards. The bullet would cross your center line at 100 yards on the up rize and cross the center line again at 350 yard on the down fall.

If you set your iron sites to hit a target at 200 yards the bullet would cross the center line at the same places.

Maybe I don't know what I'm talking about or maybe this is not what you are asking, but this is what I feel you are asking and what I think would happen.IMO

 

[Clint C]

After reading your post again I see you want a chart to show you where to set your sites and show where your bullet will cross your line of site twice.

I would think if you had one for a scoped rifle it would be the same for iron sites.

Same scenario as I said before if both are zeroed at 200 yards it should cross at the same point of yardage.

Or I'm a babbling idiot, I don't know you tell me.

 

[rcmodel]

It will not be the same.

.223 - 250 yard zero.
3/4" sight height = +2.1" at 100 yards.
1.5" sight height = +2.8" at 100 yards.
2.5" sight height = +3.2" high at 100 yards.

Ballistic software, like the free "Remington Shoot", will allow you to change the sight hight, and visabally see the differance in POA/POI at different ranges.
http://www.remington.com/products/ammunition/ballistics/remington_shoot_ballistics_software.asp

rcmodel

 

[Plank Road Farm]

Thanks "rcmodel" for the link for the ballistic software.

I don't have ballistic software and I am not looking to purchase any.

I am asking for a simple way to sight my rifles and know what the effective 1" kill zone range will be.

The best I can explain the reason for my question is to refer you to this link:

http://www.gunsmoke.com/guns/1022/22ballistics.html

I have .22 cal guns with iron sights and I want to know what is the closest range to sight them at zero and then what is the range when it will be a zero again?

The only answer may be to purchase ballistic software, but I was hoping someone could pass along some general proven method.

If this is confusing then I apoligize for my enability to communicate.

 

[rhinoh]

Did you miss that the Remington Software is FREE to try

 

[goon]

I can't give you an answer other than to tell you to get to the range and find out.
Best way to really see how your guns are going to behave.

 

[Travlin]

rcmodel -- Thanks for the link. That free software is terrific!

 

[JWF III]

rcmodel has it right. And the only place to find the answer (as far as I know) is in software. The cause for the difference is the minute change in angle between line of sight, and line of trajectory. With iron sights, the angle will (almost) always be flatter, simply because the scope is raised up off the receiver. I say almost because of sighting systems like on an AR, that have raised iron sights.

Wyman

 

[Plank Road Farm]

Thanks for the discussion guys!

I suspected from the beginning that software was the answer.

I did not overlook the 30 day free trial of the "Remington Shoot" software.

I guess I can use it for 30 days and get all my answers or find someone who has the software and email them my questions.

I also have a 1903 CG 6.5 x 55 Swede with iron sights I'd like to figure out how to sight it in for 100 yds.

Someone told me that gun was sighted in for 300 meters.

It will probably shoot 18" high at 100 yds.

Just trying to figure out my options and what to do next.

 

[rcmodel]

I don't know anything about a 30-day trial?

I've had the free version of Remington Shoot on my PC for several years. It was, and is completely free.

You only have to buy the complete version if you want it.

Heres another free one from Federal if you don't like Remington's.
http://www.federalpremium.com/resources/ballistics_application.aspx

rcmodel

 

[Plank Road Farm]

Thanks again "rcmodel" for another link.

I was not dissatisfied with the other link.

I must be reading comprehension challenged because I missed the free part on the Remington ad, I assumed it was a 30 day trial.

I will go back and download the software.

I'm just a retired guy who likes guns without a whole lot of experience.

I look forward to finding my answers with the software.

Thanks again.

Hope this thread has helped someone, it has me.