perplexed

[sigsupermatch]

Any insight will be appreciated.
Here is the issue: any ballistic calculator I use shows my load should drop 2.9 moa at 400 yards with a 300 yard zero. My load actually dropped just under 24" between these two ranges. I turned my elevation up 23 clicks on my Leupold mark 4. It hit zero.
The load is a 210 berger vld target .631 = G1 - 74gn of Viht 165. 2645 fps.
80 degree day, 60 % humidity, 700 feet elevation. no wind.
Am I not seeing something or just lost. Any ideas.

 

[FearNoWind]

If I understand your predicament:

1. your bullet drops 24 inches (approx 6 moa) over a distance of 100 yards (300 - 400)
If your Leupold Mark IV has 1/4 moa click then you raised the POI by 5 3/4 moa with 23 clicks.

2. you've run out of elevation adjustment on the scope.
Hard to tell how much you had to dial in for the 300 yard zero but if the scope has run out of adjustment under your current circumstances you need to:

a. get a set of Burris Z rings with inserts and put about 20 moa into the set up.
b. get a 20 moa rail and see if that's enough
c. Do both and broaden your range of adjustment choices

I'd suggest you avoid working with a scope adjusted way out on the outer limits of its adjustment range because images tend to get a bit distorted out on the edge of the glass and accuracy suffers.

 

[Barrelnut]

I think your rifle is really zeroed at 200 yards not 300 yards. I ran the numbers thru shooter and with a 200 yard zero, the 23 clicks (1/4 MOA) per click would be right if the rifle was zeroed at 200.

 

[Wedgy]

Your Input Variables

Ballistic Coefficient 0.631Velocity (ft/s)2645Weight (grains)210Maximum Range (yds)500Interval (yds)100Drag Function G1Sight Height (inches)1.5Shooting Angle (degrees)0Zero Range (yds)300Wind Speed (mph)0Wind Angle (degrees)90Altitude (ft)700Pressure (hg)29.53Temperature (F)59Humidity (%)0.6Ballistics Results

Range (yards) Velocity (fps) Energy (ft.-lb.) Trajectory (in) Come UP in MOACome UP in Mils Wind Drift (in) Wind Drift in MOAWind Drift in MilsMuzzle26453262-1.500000100250929344.8-4.5-1.3000200237726335.5-2.6-0.80003002248235700000040021242103-12.32.90.900050020041872-32.46.21.8000

 

[Wedgy]

like that

 

[FearNoWind]

Your Input Variables

Ballistic Coefficient 0.631Velocity (ft/s)2645Weight (grains)210Maximum Range (yds)500Interval (yds)100Drag Function G1Sight Height (inches)1.5Shooting Angle (degrees)0Zero Range (yds)300Wind Speed (mph)0Wind Angle (degrees)90Altitude (ft)700Pressure (hg)29.53Temperature (F)59Humidity (%)0.6Ballistics Results

Range (yards) Velocity (fps) Energy (ft.-lb.) Trajectory (in) Come UP in MOACome UP in Mils Wind Drift (in) Wind Drift in MOAWind Drift in MilsMuzzle26453262-1.500000100250929344.8-4.5-1.3000200237726335.5-2.6-0.80003002248235700000040021242103-12.32.90.900050020041872-32.46.21.8000

Oh, yeah. That clears everything up.

 

[sigsupermatch]

thanks. I will double check my zero at 300 and check the drop at 400 again. my issue is this bullet seems to be dropping a lot for the range. I have a 20 moa mount so I should still be good on adjustment.

 

[FearNoWind]

Sig, sumthin has got to be wrong with your data. I suspect the theory that you're actually zeroed at 200 may be the best one so far. Your scope, if it's the model I think it is, has about 35 moa of adjustment from it's center (total of 75 moa) and that's a lot of adjustment. Couple that with a 20 moa rail and your got far more adjustment than you need to get where you want to go - I don't understand how you got to the end of that adjustment.
Am I interpreting it correctly that "I turned my elevation up 23 clicks on my Leupold mark 4. It hit zero" means you hit the end of your adjustment range or does "zero" in this context have another meaning?

 

[sigsupermatch]

I agree the 200 yard zero instead of my mistaken 300 yard zero is the issue. When I stated I hit zero, I was referring from one target to the next.

 

[sigsupermatch]

if interested. I found my issue. I was mistaken on the distance to the far target it was 500 yards not 400. So, the drop in question is more in line with what you would expect over 200 yards. It helps to know the distance.

 

[porkchop401]

if interested. I found my issue. I was mistaken on the distance to the far target it was 500 yards not 400. So, the drop in question is more in line with what you would expect over 200 yards. It helps to know the distance.

Don't sweat it , A couple of days ago I was sighting in my long awaited lr rig . After zeroing I ranged a 500yd plate, got a solution , sent it .... nothing, all I can here is my buddy cackling . He suggest I recalculate my solution. that is when I noticed the dial is still setting on "ZERO" It happens