rough scope adjustments?

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ADHDCanuck

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If my rifle is zeroed for 100 yards and I'm on an indoor rifle range thats only 40 yards... using a nice scope like a bushnell 6x18x50 banner... i would just have to aim a little below the bullseye to compensate wouldnt i?
and if its grouping i'm after, i just have to always aim at the same point, and they should all end up in the right area... but over a 60 yards difference how much am i looking at straying? on the target the grouping should be what.... if i aim right dead centre... maybe an inch or two off centre?

it isnt a mil-dot scope... its multi-X... trial and error?
 
If I recall correctly, sighted in at 100 will be something like 4" high at 40 yards.
The problem is the original 100 yd sight in.
A standard .22 is at the top of it's arc of travel at 40 to 50 yds and drops off fast after that, 4" at 100 and something like 3 feet at 200. If you sight in at 60 yards you'll only be 1/2" high at 40.
There is a chart part way down this page, that should help.
h ttp://www.gunsmoke.com/guns/1022/22ballistics.html
 
it had me curious, with a lighter bullet, and muzzle velocities exceeding 2400fps (instead of the 1200fps that chart uses) i would think you'd get flatter trajectory and less drop.
One way to find out :) Ill bring the chart to the range, use a large target with measurements on it, set up with the bipod and lock it in dead centre...see where the grouping sits then compare to the chart :) Awesome reference thanks
 
If you don't know the BC and velocity, just try it at 40 yards and make a note of how many clicks you need to adjust. You can put a spot of nail varnish on the turret to remind you.
 
If my rifle is zeroed for 100 yards and I'm on an indoor rifle range thats only 40 yards
Click to expand...

I see you're in Edmonton. If you're shooting at Phoenix it's not actually 40 yards. If you laser it, it's about 36-37 yards.

They will deny it to the ends of the earth but I'm not the only one to make that observation...
 
...Right. Which is also the distance the bullet is travelling. So if you're trying to extrapolate a 100y sight in using the impact point at 40ish yards it's good to know how far the bullet is actually travelling...
 
If you have your rifle sighted in now for 100 yards, I would mark the setting on the turret, like someone said, then resight for the 37 yard range. Mark that setting, also, so you can easily go back and forth.
In target shooting you should always use the same aim.
 
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