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Size of target at 800 yards? And how close to center?

 
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Old 10-07-2013, 09:13 PM
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Size of target at 800 yards? And how close to center?

Hey guys I'm wondering what size target your shooting at 800 yards and also how far off-center are your groups at that 800 yards?? I've been shooting half minute groups but I'm off Center at 800 yards about 5 inches left and 4 inches high. I know someone will say move 5 inches to the right and 4 inches low. I don't know if I can shoot that consistent each time at 800 yards. I guess this is why I'm wondering how close you guys stick them to around Center?? Thanks!
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Old 10-07-2013, 09:39 PM
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Join Date: Feb 2013
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Re: Size of target at 800 yards? And how close to center?

Scope cant and tall target test. Look it up in the Google custom search located in the upper right corner. This may help if not already conducted.
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Old 10-07-2013, 11:43 PM
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Re: Size of target at 800 yards? And how close to center?

You should be able to dial in the elevation by making adjustments within the calculator. For windage there could be a few things at work. Spin drift at that range could be pushing you several inches to the right (assuming RH twist), meaning your line of sight is actually 8 inches off or thereabouts. A 2mph crosswind will make your bullet drift that much, and it's hardly even perceptible if you're not paying close attention.
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Old 10-07-2013, 11:58 PM
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Re: Size of target at 800 yards? And how close to center?

Consistent errors are always the easiest to solve. Check the data you are feeding your ballistics calculator.

Personally I'd say sight in at 800 and work it back reversing your drop chart and then see where you end up when you get back to 100yds.

There's a slight possibility that it's "driver error" but being this consistent makes that less liikely.

What size groups are you getting at 100? 200? 800?

Generally I'll shoot at a 2MOA target for the given range using a small bull that can easily be distinguished.

If you aren't getting at least 2MOA then we've got a lot of possibilities.
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Old 10-08-2013, 06:30 AM
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Re: Size of target at 800 yards? And how close to center?

I will try to shoot at a target that provides an aiming point that is .5-1MOA in size. I agree with prior posts that a tall target test is important, not only for cant, but also for determining actual click value. I will center exactly for elevation and be sure to enter either the correction in my ballistic calculator for true velocity, or actual click value if my scope turret is not .25 click value. Either will do but if tour turret is off your velocity will not be true. This will keep my zero. For windage, I will generally rely on my tall target test, and confirm on a windless day making sure to take spin drift into account. It has almost always been on if my tall target test and scope alignment was good. I wil always try to center my groups at my maximum shooting range.
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Old 10-08-2013, 07:10 AM
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Re: Size of target at 800 yards? And how close to center?

Wildrose - my groups are good at 100 and 200 yards as well.

My height isn't as much of a concern for me as I was 4 inches high, chart called for 14.3 Moa I dialed to 14.5 and should have done 14.25..2 inches in error there.

I think I'm going to try the tall target test (did it for turret validation clicks couple years ago) to see it there's a cant. When I mounted my scope I used the wheeler leveling kit an also a rope with a cinder block hanging from a tree to try an make sure the reticle was level. I do have a level on my gun I level before each shot currently.

During the tall target test, do you place the reticle to be directly on the vertical line you draw? If ur scopes level they should match up? The paper obviously needs to be level/straight on the board to validate than as well right? Now if you notice the sting working to the left of the line do you just move the crosshairs right or does your scope need to be remounted?

Thanks for all the info guys! I really would like to get left and right dialed in better at distance.
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Old 10-08-2013, 07:59 AM
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Re: Size of target at 800 yards? And how close to center?

At 100 yards hitting directly above center maybe isn't a good indication of left or right at longer distance? Bullet hasn't stabilized? Maybe why I'm seeing that group at 800 left?
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