How to aim when rifle is canted at an angle?

[hellbndr23]

I'm going to run a zombie biathlon. Part of the event is called the speed wall. There's a very low shooting position where most go urban prone. Lay on your side with rifle on its side. Rotated 90 deg from normal orientation. There's also a 45 deg slit in a fence. Small enough that you have to cant the rifle to use optics. Man size target for both positions is at 300 yards.

AR with 50 yard 0. Where do you aim?

[hellbndr23]

Forgot the pics.

[npe001]

With an Eotech and shoot where the dot is? lol

[Kcwwcb]

not sure the drop for your rig, but you should know how much it drops at 300yds. The holdover would be that amount at a 10:30 orientation from the typical vertical reticle position, I think.

Either that or I am Zombie deadmeat!

[howabouttheiris]

Would really need to know your scope height to calculate it exactly....

http://www.jbmballistics.com/cgi-bin/jbmtraj-5.1.cgi allows for cant to be entered to produce tables.

90 degrees is "pretty easy" your dialed windage becomes elevation. 0 windage dialed = 0 elevation, so you need to aim ~ 9" high on the target. (the normal drop at 300 yards), Your dialed elevation becomes windage. so your elevation produces an angle that you need to remove by aiming to the left of the target.

45 is basically a 30/70 rule.

Here is it graphically.

[Texastaxi]

The bullet will drop the same, no matter what angle the gun is rotated.
Figure out where you hit, at 300, with the rifle upright, and then holdover the same amount, with the rifle canted.

[AgBass01]

You can buy 45 degree offset iron sights. I have a buddy that does a lot of 3 gun competitions and he has these on his.

[dhillis]

[ame="http://www.youtube.com/watch?v=F-27kz5TiiY"]Guy shoots his own truck - YouTube[/ame]

Just make sure you don't shoot it like this.

[Z7_Matt]

Guy shoots his own truck - YouTube

Just make sure you don't shoot it like this.

Ouch lol

[meltingfeather]

The bullet will drop the same, no matter what angle the gun is rotated.

I don't think anyone is saying the bullet will act any differently in the air.
Figuring out where the optic's aim point is relative to the bullet's arc is the issue... and it's not as easy as holding over what you know the vertical drop is... especially at an angle other than 90 degrees.

[hellbndr23]

Would really need to know your scope height to calculate it exactly....

http://www.jbmballistics.com/cgi-bin/jbmtraj-5.1.cgi allows for cant to be entered to produce tables.

90 degrees is "pretty easy" your dialed windage becomes elevation. 0 windage dialed = 0 elevation, so you need to aim ~ 9" high on the target. (the normal drop at 300 yards), Your dialed elevation becomes windage. so your elevation produces an angle that you need to remove by aiming to the left of the target.

45 is basically a 30/70 rule.

Here is it graphically.

You are rotating the gun to the right correct? Ejection port down.

I was thinking rotate to the left so they eject straight up.

If I understand correctly. Shoot the shoulder on the opposite side that you rotate and you should be good.

Just have to hit the target. No scoring on hit location.

[hellbndr23]

You can buy 45 degree offset iron sights. I have a buddy that does a lot of 3 gun competitions and he has these on his.

No way I could hit a 300 yard target with irons.

They also wouldn't keep you from needing to cant the rifle and your head to shoot in those positions.

[AgBass01]

No way I could hit a 300 yard target with irons.

They also wouldn't keep you from needing to cant the rifle and your head to shoot in those positions.

You don't cant your head with these. You only cant the rifle.

[hellbndr23]

You don't cant your head with these. You only cant the rifle.

Yes I understand. If you try and shoot any sight through that 45 slit you cannot keep an upright head or sight (as in your pic) Yes his gun is canted but head and sight are upright. All u will see is wood.

Now I guess you could leave your gun vertical and scoot your cheek weld over far enough to use the irons but I'm not sure how well that would work.

[AgBass01]

Ok, I get what you are saying. Pardon my brain fart on that.