Nightforce problems.???

STL_Shooter

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Nov 1, 2002
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189
Location
St. Louis
The NP-R2 really has changed the way I shoot long range. Holding over becomes much like archery... Quite easy to shoot one target at 100, another at 550, the next at 350, etc, without the "click and count" routine...

I love the idea of the stationary optics - no mechanical intervention required to shoot "way out there"... Great stuff!
 

Brent

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Joined
Jun 12, 2001
Messages
2,537
Location
Palmer, Alaska
I'm not sure I follow you completely.

This is the drop chart the Oehler Ballistic Explorer gives me for a BC of .507 at 3380 fps at standard conditions.

100= -8.7MOA
200= -7.7
300= -6.2
400= -4.4
500= -2.3
600= 0.0
700= +2.5
800= +5.4
900= +8.5
1000= +12.0

I guess I expected to see the 100 yard increments fall on the 2 MOA tic marks magically.

Take the 800 yard hold over amount of +5.4MOA for example, are you supposed to hold 2 ticks (2 MOA per tic) above for 4 MOA and estimate the other 1.4 seeing's how the next tic is at 6 MOA?

When you get the load tuned right, the reticle will be more accurate than the 1/4 moa click resolution on the scope!

Can you explain how? I don't see why.

The vertical shot tic mark, ( the very top line in the R2 is nothing more than the sight line which is parallel to the bore line when the scope is zeroed @ 600 and on full power.

The program indicates 71.45" of drop at 600 yards. The bullet would hit around 11.45" low if the 10 moa tic mark above the center crosshair was was following the bore, true?

11.37 MOA is needed to account for the 71.45" of drop at 600 yards is all I'm trying to say, so it would appear that the bore line is somewhat higher than the 10 MOA tic mark if actually zeroed at 600 yards. It is close though. Correct me if I'm wrong.

The 220 smk is too heavy to integrate with the reticle below 6,000 ft. altitude

What happens if it is used? Does the 100 yard hold under go beyond the 10 moa tic mark?

We have to find you a load with the 180 that will get you between 3360 and 3400.

Can you explain why the 3200 fps load will not work as well.

Sounds very interesting so far. Thanks
 

Brent

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Jun 12, 2001
Messages
2,537
Location
Palmer, Alaska
You must have posted as I was typing, slowly
.

It took me a minute to see what you were doing dividing by two, and at the same time keeping the results the same.

You are ruducing the object size number in half, and tics are 2 MOA apart, so counting them as "one" reduces them in half too. This does make it easier in the head.
Thanks for the tip.

I've noticed that a mature moose is about 1/3rd deeper through the chest than a 2 yr old. I was looking at two different ones at 400 yards ranged with a laser, the reticle clearly showed the difference and by how much too.
I think it was about 6 ticks vs. 4 ticks or real close to that.

We've ranged rims on our vehicles (no one in them of course) out past 1000 yards with the R2 while using the lasers to verify the distance and always were +-15 yards and we weren't even using a very good rest either.

Another pointer too is if you have a laser range finder and can range an animal accuratly, you can then measure it's head size, ear length, chest depth and OAL etc using the R2 reticle with amazing accuracy.
 

Brent

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Joined
Jun 12, 2001
Messages
2,537
Location
Palmer, Alaska
I have several drag curves if you recommend one?
I can also enter multible BC's (5 seperate ones) at multiple VE ranges (5 also).

By the way, I'm getting a BC of .524 with the 180 Nosler BT and .576 with the 180 Scirocco at 3200 fps on the Oehler 43 both are at 63,000 psi. 96.5 and 97gr loads were at 70k psi and MV was 3347, how would I get 3400 with the same powder just changing primers, is it possible you think?

I shot the 180 BT at 600 yards, it took 9.75 MOA to zero it.

The results with a MV 3400 and BC .520 are...

100= -8.5
200= -7.6
300= -6.0
400= -4.2
500= -2.2
600= 0.0
700= +2.5
800= +5.2
900= +8.2
1000= +11.6

Are we looking for the 100 yard numbers to fall on the tics?
 

Brent

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Joined
Jun 12, 2001
Messages
2,537
Location
Palmer, Alaska
It will give total drop, bullet path and zero adj. in MOA as well as several other things also.

The sight hight was set at 1.5" which was wrong, it should be 1.79" measured above the bolt.

Nice shot on the elk there. The wind can be a big shutdown in this area at times too, the snow isn't a problem in aug-sept around here, farther up north it can be. Nice to have a "failsafe" no mater what.
 

Brent

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Joined
Jun 12, 2001
Messages
2,537
Location
Palmer, Alaska
I've been using the Fed 215M.
I changed the sight height to 1.8 and the 100 yd zero went down to -8.2 and the 1000 yd went to +11.5.

Sounds like you boys were sheep hunting on that trip
.
 

Brent

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Joined
Jun 12, 2001
Messages
2,537
Location
Palmer, Alaska
We're about 4 1/2 hours away from Homer. The road is pretty fast down that way now.
We're 45 min north of Anchorage.
 

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