100 yards zero scope use at less than 25 yards

[alvgalb]

Hello;

I have a doubt related to the use of a scope zeroed hunting rifle.
If I zero the scope at 100 yards would I be able to use it in a self defense situation at lest than 25 yards, I mean, the image through the scope tube and the point of aim at less than 25 yards would be still reliable and on target?

Thanks

[Merc1138]

If you're aiming for center of mass, or even for the head, those shots being a couple of inches low won't be a problem.

[sffred]

IMHO, I believe that if you sight your hunting rifle @ 100yrds, and were to use for self defense @ approx 25yrds, windage is the same, you have to compensate the rifle by aiming slightly higher approx 1"-1.5" depending on your type of sights.

i had run across this problem a few years back on my noveske. sighted @ 100yrds then shot some cqb trainings and was shooting low aiming @ 20-30 yrds.

hope this helps.

[triggs75]

http://www.ar15.com/forums/t_3_18/512335_.html

Here is showing a 100 yd zero

[Norsemen308]

the bullet is going to land about 3 inches under where your cross hairs are....

[ZombieTactics]

... I have a doubt related to the use of a scope zeroed hunting rifle. If I zero the scope at 100 yards would I be able to use it in a self defense situation at lest than 25 yards, I mean, the image through the scope tube and the point of aim at less than 25 yards would be still reliable and on target? ...

The charts and other information so far are based upon standard ballistics with a 2.5" (or so) sight-above-bore. The same principles apply, but you need to adjust for your particular sight-above-bore distance, relative to your choice of caliber and specific round.

[30Cal]

It'll work fine.


However if the objective divided by the power equals a number less than seven, it'll be useless if your eyes are dilated.

[alvgalb]

Thanks for the answers, what I can understand from your information is, the bullet trajectory for a .308 rifle zeroed at 100 yards is not going to change dramatically at 25 yards just a question of 1 inch or less, the other part of the question would be that the image of the scope be reliable at the point of impact and having the scope set at the lowest magnification (such a way the the objective diameter divided by the scope power give you good eye sight to focus) will solve that problem.

[alvgalb]

However, would be possible to have some kind of focus distortion at distances below 25 yards, maybe, parallax or anything like that?

[Merc1138]

However, would be possible to have some kind of focus distortion at distances below 25 yards, maybe, parallax or anything like that?

Yes... however you'll still be able to hit a target with it.

You seem to have come across the problem with relying on a magnified scope for close shooting. This is why people use irons and red dots for that.

[chad68]

Actually using the scope on a hunting rifle at 25 yards or less for home defense is odd. I know it's a hunting rifle zeroed to 100 yards but you need to use it FHD too, I get that.

But with a magnified scope zeroed to any yardage for that matter at 25 yards or less I would just aim (in the general direction of bad guy) for center of mass like a shotgun the best you can, forget about the scope and fire till bad guy stops.

Who really has the time in a life and death situation to close one eye and look through a magnified scope with crosshairs? If the guy is 25 yards or less and running at you in low light conditions or bright light for that matter, parallax and <3.0" bullet drop is the least of your worries.

You need something with FAST target acquisition and something that will work in bright and low light conditions. If you are stuck on using a hunting rifle for home defense I would at least get some Burris rings with the mini pic rail on them and add maybe some kind of short radius folding blade sights or even just a signle blade on the front ring.

I wouldn't ever rely on anything that uses batteries or crosshairs in a home defense situation period.

[vintagearms]

You would be better off having a small offset RDS attached to your scope than using your scope at that range.

[a1c]

I don't understand why you'd imagine a scenario where you're using a scoped rifle to shoot someone at 25 yards in a self defense situation. Makes no sense to me.

[Merc1138]

I don't understand why you'd imagine a scenario where you're using a scoped rifle to shoot someone at 25 yards in a self defense situation. Makes no sense to me.

I'd definitely say it's a situation where you grabbed the wrong gun. If the scopes hunting rifle is really the only thing available, go pick up a shotgun or a handgun. My tikka is probably on the list of guns I'd grab last if I ever needed to defend my home(not because it's a bolt action, and the OP never said if it was a semi auto or not), but because the way it's setup it would be the least ideal thing to have to use.

[dieselpower]

using a scope under stress on a threat 25 yards away (or less) is useless and will get you killed. get a side mounted RDS

these guys were lucky the cat was hit atleast twice and there was more then one hunter. fast forward to 25 seconds