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  #1  
Old 06-18-2019, 10:42 AM
Brbpuppy Brbpuppy is offline
 
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Default 100 Yard Zero, vs Point Blank Zero?

What would you gentlemen suggest?
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  #2  
Old 06-18-2019, 10:49 AM
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General use -Point Blank. If you are specifically shooting 100 yards like over a feeder, water tank or something then sight in for the exact distance. Since I hunt with a number of different guns all of my big game guns are sighted 3.25 high at 100 and then I tape a drop card out to 800 yards to the stock. My gopher, small varmint guns are 1.5" high at 100 and the same drop card.
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Old 06-18-2019, 11:26 AM
elkhunter11 elkhunter11 is offline
 
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Fr me, it depends on the scope, and the application. With a basic crosshair retical for big game, I prefer 2-3" high at 100yards, depending on the trajectory of my load. With a BDC retical, I usually zero the main crosshair at around 200 yards. For target and varmints, I use scopes with turrets and plain crosshairs, and zero at 100, and twist turrets as required.
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Old 06-18-2019, 04:52 PM
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For hunting applications, I zero at 200M which I think is quite common when using a standard reticle. For most of the cartridges I shoot, the 200M zero translates to
2.5 - 3.5”high at 100M and 8 - 11” low at 300M. So, if a a nice Mule buck was broadside at 300M, the horizontal crosshair would be level with his back. A similarly positioned moose would see the horizontal on hair just below the backbone.
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Old 06-18-2019, 06:21 PM
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Personally for me, I have found over the years that zeroing my modern cartridge rifles at 200 meters works best regardless of the cartridge
I then check the POI at 25,100 and 300 and practice at random distances.
Cat
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Old 06-18-2019, 06:29 PM
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Quote:
Originally Posted by catnthehat View Post
Personally for me, I have found over the years that zeroing my modern cartridge rifles at 200 meters works best regardless of the cartridge
I then check the POI at 25,100 and 300 and practice at random distances.
Cat
X2, except I use 200yds vs meters, it’s just what I’m used to.
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Old 06-18-2019, 06:34 PM
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X2, except I use 200yds vs meters, it’s just what I’m used to.
I don’t have a choice, Our range is set in meters past one hundred yards !LOL
Cat
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Old 06-18-2019, 06:49 PM
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2.5-2.8” high at 100yds.
Usually gives me a hold on hair till 320-400yds scenario depending on the cartridge.(big game hunting)
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Old 06-18-2019, 09:46 PM
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2.5" high at 100. Then at my self-imposed limit of 400 I hold on brown and then the animal goes down. At least that's the way it's supposed to work. Most often it does.
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Old 06-18-2019, 10:37 PM
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(Most) cartridges have a PBR of around 220-235 yards so sighting in at 200 is good advice.
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Old 06-19-2019, 02:36 PM
Brbpuppy Brbpuppy is offline
 
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Appreciate all the input. Thank you guys.
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Old 06-19-2019, 03:17 PM
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2.5" high at 100. Then at my self-imposed limit of 400 I hold on brown and then the animal goes down. At least that's the way it's supposed to work. Most often it does.
I do the same
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Old 06-19-2019, 03:24 PM
Scottmisfits Scottmisfits is offline
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I'm a 100 yard kind of guy. My 22lr's at 50 yards. You're still going to be holding off the cross hairs with a PBR, why not have a simple set point?
Myself, I like adjustable turrets. Not all of mine are exposed but they are all easy to adjust, except one which I hate. If I need to adjust past the point of where I really want to hit with a 100 zero, I figure I'll probably have the time to adjust. If not, I still should know my holdovers for whatever distance I want to be shoting.

Again, this is my opinion.
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  #14  
Old 06-19-2019, 06:34 PM
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Most of my hunting rigs are set up for MPBR for each caliber. The exception is my bush carbine (308) the 2-7 scope has bdc that works out when zeroed at 100 has a short 50 yd hash above the zero line, and then 200,and 300 yd hash marks. As this is primarily a bush gun it works out perfectly. All my target rifles are zeroed at 100 and I either use the hash marks/ mil dots as hold overs or dial.
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Old 06-19-2019, 06:43 PM
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I’m not a 100 yd zero fan, but there is nothing wrong with either if you know your rifle and it’s trajectory well.
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Old 06-19-2019, 09:24 PM
Pioneer2 Pioneer2 is offline
 
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Default My take

+ 2" @100 yards
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Old 06-20-2019, 10:53 AM
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I sight in for 200 yards , something I find with most of my rifles is if I sight in at 100 yards for a 200 yard zero and then check at 200 yards my group is always 3ish inces to the right . I thought I was just canting the rifle so I got a bubble scope level and same problem . Using a bi pod and a rear bag. I get the same problem using shooting sticks aswell . Anyone else have this problem ? Once I'm on at 200 yards my wind age is good out to 5-600 but when i come back to 100 yards I'm 3 inches left again ?? Could this be a parallax thing ? I'm a right hand shooter left eye dominant with a slight stigmatism.
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Old 06-20-2019, 11:01 AM
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Quote:
Originally Posted by spazzy View Post
I sight in for 200 yards , something I find with most of my rifles is if I sight in at 100 yards for a 200 yard zero and then check at 200 yards my group is always 3ish inces to the right . I thought I was just canting the rifle so I got a bubble scope level and same problem . Using a bi pod and a rear bag. I get the same problem using shooting sticks aswell . Anyone else have this problem ? Once I'm on at 200 yards my wind age is good out to 5-600 but when i come back to 100 yards I'm 3 inches left again ?? Could this be a parallax thing ? I'm a right hand shooter left eye dominant with a slight stigmatism.
It very easily could be parallax. Do you close your left eye or shoot with both open? If you are left eye dominant and can't shoot left handed then I would close the left eye when shooting a rifle. Most rifle scopes with no Parallax adjustment are set for 100 yards. If you shoot with one eye open sometimes and then one eye closed you will often see that kind of left right shift in groups.

Last edited by Dean2; 06-20-2019 at 11:24 AM.
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Old 06-20-2019, 11:24 AM
elkhunter11 elkhunter11 is offline
 
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Quote:
Originally Posted by spazzy View Post
I sight in for 200 yards , something I find with most of my rifles is if I sight in at 100 yards for a 200 yard zero and then check at 200 yards my group is always 3ish inces to the right . I thought I was just canting the rifle so I got a bubble scope level and same problem . Using a bi pod and a rear bag. I get the same problem using shooting sticks aswell . Anyone else have this problem ? Once I'm on at 200 yards my wind age is good out to 5-600 but when i come back to 100 yards I'm 3 inches left again ?? Could this be a parallax thing ? I'm a right hand shooter left eye dominant with a slight stigmatism.
When parallax is an issue, I usually find that the groups grow, but don't shift POI in a consistent way . I also find that the error grows with distance.
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Old 06-20-2019, 12:16 PM
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I shoot with my left eye closed all the time . I've learnt to live with this 3 inch shift by zeroing at 200 and compensating a little left while hinting under 100 yards . Odd thing is iron sights like on my blr do not produce these results .
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Old 06-20-2019, 12:21 PM
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Quote:
Originally Posted by spazzy View Post
I shoot with my left eye closed all the time . I've learnt to live with this 3 inch shift by zeroing at 200 and compensating a little left while hinting under 100 yards . Odd thing is iron sights like on my blr do not produce these results .
If you always shoot with one eye closed I would have the scope checked for problems. It could be that the parallax is not set correctly or there is some misalignment in the lenses, or erector. You should not be getting that kind of a consistent shift over a 100 yard difference if it isn't caused by your eyes.
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Old 06-20-2019, 02:48 PM
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Quote:
Originally Posted by spazzy View Post
I sight in for 200 yards , something I find with most of my rifles is if I sight in at 100 yards for a 200 yard zero and then check at 200 yards my group is always 3ish inces to the right . I thought I was just canting the rifle so I got a bubble scope level and same problem . Using a bi pod and a rear bag. I get the same problem using shooting sticks aswell . Anyone else have this problem ? Once I'm on at 200 yards my wind age is good out to 5-600 but when i come back to 100 yards I'm 3 inches left again ?? Could this be a parallax thing ? I'm a right hand shooter left eye dominant with a slight stigmatism.
Did you mount your scope by aligning the vertical post with a plumb line, or a bubble level on the top turret?

Long story short - actions and scopes aren’t always square, bubbles can lie, always use a plumb line. Couple degrees off vertical could easily explain the POI shift.
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Old 06-20-2019, 03:09 PM
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Quote:
Originally Posted by 3blade View Post
Did you mount your scope by aligning the vertical post with a plumb line, or a bubble level on the top turret?

Long story short - actions and scopes aren’t always square, bubbles can lie, always use a plumb line. Couple degrees off vertical could easily explain the POI shift.
Three inches is a lot to be out from 100 to 200 yards because of an out of alignment reticle I would think .

I plan on testing this to see how much POI is actually because it seems to be that is fairly close to see that much deviation ,
At longer ranges it certainly is noticeable however .
Cat
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  #24  
Old 06-20-2019, 04:51 PM
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Quote:
Originally Posted by spazzy View Post
I shoot with my left eye closed all the time . I've learnt to live with this 3 inch shift by zeroing at 200 and compensating a little left while hinting under 100 yards . Odd thing is iron sights like on my blr do not produce these results .
If I am understanding your description correctly, could the cause to be a parallax issue related to inconsistency in aligning your eye at the same spot in your scope? Of course, there is no parallax issue with irons or unmagnified “dots”.
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Old 06-20-2019, 10:31 PM
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Quote:
Originally Posted by spazzy View Post
I sight in for 200 yards , something I find with most of my rifles is if I sight in at 100 yards for a 200 yard zero and then check at 200 yards my group is always 3ish inces to the right . I thought I was just canting the rifle so I got a bubble scope level and same problem . Using a bi pod and a rear bag. I get the same problem using shooting sticks aswell . Anyone else have this problem ? Once I'm on at 200 yards my wind age is good out to 5-600 but when i come back to 100 yards I'm 3 inches left again ?? Could this be a parallax thing ? I'm a right hand shooter left eye dominant with a slight stigmatism.
Your scope mounting holes are not in line with the bore of the rifle.
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Trades I would interested in:
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especially! with the HHR reticle. (no duplex pls.)
- older 6x fixed scopes with fine X or target dot.
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  #26  
Old 06-20-2019, 10:39 PM
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I have my rifles sighted in 4" high at 100yrds. At 400yrds I just lay the crosshairs on the top of the back and I'm good to go. Most people shouldn't be shooting past 300yrds. Lots think they are better shots then they really are.
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  #27  
Old 06-20-2019, 10:39 PM
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Quote:
Originally Posted by 6.5 shooter View Post
Your scope mounting holes are not in line with the bore of the rifle.
Excellent point. I didn't think about that but it is a very real possibility. Same as an offset scope mount, if the holes were far enough out of alignment you could get this shift. They wouldn't need to be all that far out to get a 3" shift over a 100 yards.
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Old 06-21-2019, 06:32 AM
Scottmisfits Scottmisfits is offline
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Easy way to test that theory, it wouldn’t be as extreme, is to shoot at 50 yards. Where is your impact? 25 yards?
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  #29  
Old 06-21-2019, 07:26 AM
elkhunter11 elkhunter11 is offline
 
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Think about a sidemount scope, if the crosshairs are 1" to the side of the bore, and you sight in at 100, at 200 the windage will be out 1", and at 300, the windage will be out 2". Lay a rifle with scope mounted on it's side, and sight it in that way at 100, and at 200, the windage will be out the difference between the crosshairs and the bore, at 300, the windage will be out twice that much. Angularity and offset don't explain a difference between 100 and 200, but no difference between 200 and further. While I normally see larger groups with a parallax issue, if a person held his head to one side, and did it consistently you could have a poi shift at one distance, but parallax could correct that shift at other distances. If you think of the parallax adjustments on a scope, the graduations are much larger at less than 100 yards, and by the time to get past 200 yards, very little correction is required.
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Old 06-24-2019, 02:43 PM
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Took the old lady's 243 out and low and behold no difference in wind ages from 1 - 200 yards ... this happens with a rem 700 308 win and a tikka t3x in 7mm . I'm thinking maybe a barrel harmonics thing ? I ruled out a bad flinch by dry firing a bunch . Be pretty odd to have the same thing happening in both rifles .
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