MK5 HD vs NX8 . . Thoughts?

Which do you prefer?

  • Leupold Mark 5HD 3.6-18x44

    Votes: 35 28.7%
  • Nightforce NX8 2.5-20x50

    Votes: 69 56.6%
  • Other

    Votes: 18 14.8%

  • Total voters
    122
Joined
Jan 19, 2020
Messages
413
Agree. Great read. My takeaway was I should have got my 2.5-10 NXS in mil instead of MOA!


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bpurtz

WKR
Joined
Jan 22, 2016
Messages
477
Correction factors:


Rule of thumbs to get close first, and then how to get your actual correction factor for your gun specifically.


Standard base (average gun)=

100- 0
200- .5
300- 1
400- 2
500- 3
600- 4


So what happens when you have a combo that shoots faster than 2800’ish fps or slower than 2,500’ish with a low BC? General rule is “Bad Gun”, “Average Gun”, “Good Gun”.

Average is the standard above.

Bad= Add .5 mils past 300 to the base.

Good= Take .5 mils off the base past 300 from the base.

How I did @grappling_hook 270 combo is to use the corrections. The BC is .4, but the MV is above 2,900’ish. That means is a “good gun”. He gave 480 yards, base is “2.8 mils”, but it’s a “good gun”, so take .5 mils off. The correction is “elevation 2.3 mils”. How well does it work? The actual correction is 2.2 mils at 5K DA. That’s a .1 mil error= 1.7 inches. Having never shot the rifle, didn’t put it into a calculator, and with 5’ish seconds of getting the range/gun info, I would have killed any big game animal on earth.


If it’s a “Bad Gun”. That is low MV, and/or low BC, add .5 mils to the base. Do not let the numbers overwhelm you. This takes less than 30 minutes to have a solid handle on it with paper practice.

Think critically: Who has a higher chance of killing an animal given all else being equal- a person that needs to look at a drop chart for both wind and elevation adding that time to make the shot? Or a person that can do it in their head in less time than it takes to chamber a round?
I guess, I'm going to give a FFP/Mil scope a try - just ordered an ATACR 4-16x42 w/ Mil-R. Not sure which gun I'm putting this on yet, but I'm curious how I determine if I have a "bad, average, or good" gun.

I've got the following:
7mm Rem Mag shooting 195 Berger - 2925 fps, .755 G1
.300 PRC shooting 215 Berger - 2840 fps, .691 G1
.338 Lapua shooting 300 Berger - 2780, .814 G1

Would you classify bad, average, or good for the base?
 

Formidilosus

Super Moderator
Joined
Oct 22, 2014
Messages
8,001
I guess, I'm going to give a FFP/Mil scope a try - just ordered an ATACR 4-16x42 w/ Mil-R. Not sure which gun I'm putting this on yet, but I'm curious how I determine if I have a "bad, average, or good" gun.

I've got the following:
7mm Rem Mag shooting 195 Berger - 2925 fps, .755 G1
.300 PRC shooting 215 Berger - 2840 fps, .691 G1
.338 Lapua shooting 300 Berger - 2780, .814 G1

Would you classify bad, average, or good for the base?

Pull up your data for each and see what you have for 300, 400, 500, and 600 yard drops. That will give you a correction factor to apply.
 

bpurtz

WKR
Joined
Jan 22, 2016
Messages
477
Pull up your data for each and see what you have for 300, 400, 500, and 600 yard drops. That will give you a correction factor to apply.
Screenshot_20240105_200258_Leica Ballistics.jpg

My .300 PRC looks like good gun so deduct .5 mil from the standard base, the quick drop would be:
300 yd - .5 mil (.6 on range card)
400 yd - 1.5 mil (1.3)
500 yd - 2.5 mil (2.1)
600 yd - 3.5 mil (3.0)

Am I calculating correct?

At 600 yards using the quick drop vs calculator that shot wounds a deer - impact is 8.5" high. Does the quick drop not work for some combos?
 
Last edited:

Formidilosus

Super Moderator
Joined
Oct 22, 2014
Messages
8,001
View attachment 652765

My .300 PRC looks like good gun so deduct .5 mil from the standard base, the quick drop would be:
300 yd - .5 mil (.6 on range card)
400 yd - 1.5 mil (1.3)
500 yd - 2.5 mil (2.1)
600 yd - 3.5 mil (3.0)

Am I calculating correct?

At 600 yards using the quick drop vs calculator that shot wounds a deer - impact is 8.5" high. Does the quick drop not work for some combos?

Zero at 100 yards.
 

bpurtz

WKR
Joined
Jan 22, 2016
Messages
477
Zero at 100 yards.
Screenshot_20240106_073256_Leica Ballistics.jpg

.300PRC, 100 yd zero
215 Berger .691 G1
2840 MV
So good gun deduction from base...

300 yd - .5 mil (1. on range card)
400 yd - 1.5 mil (1.7)
500 yd - 2.5 mil (2.5)
600 yd - 3.5 mil (3.4)

Changing the zero to 100 yards fixes the 500 & 600 yard error, but now my 300 yard shot is 5.4" low and my 400 yd is 2.9" low with the quick drop - the 300 and 400 yard error isn't acceptable for me.
 

Formidilosus

Super Moderator
Joined
Oct 22, 2014
Messages
8,001
View attachment 652893

.300PRC, 100 yd zero
215 Berger .691 G1
2840 MV
So good gun deduction from base...

300 yd - .5 mil (1. on range card)
400 yd - 1.5 mil (1.7)
500 yd - 2.5 mil (2.5)
600 yd - 3.5 mil (3.4)

Changing the zero to 100 yards fixes the 500 & 600 yard error, but now my 300 yard shot is 5.4" low and my 400 yd is 2.9" low with the quick drop - the 300 and 400 yard error isn't acceptable for me.

Start the .5 correction at 400 yards. As for being 2.9” off at 400- it’s quick dope. As in rushed.
 
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