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Leica 1600B

 
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  #22  
Old 07-23-2012, 11:39 PM
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Join Date: Aug 2005
Location: Mouth of Hobble Crk Canyon, Utah
Posts: 597
Re: Leica 1600B

I spent an hour or so at the mouth of Rock Canyon, Provo, Utah, ranging angles up to 32 deg out to the limits of the the ABC Ball Calc. It's a wonderful tool. I would range a rock, tree or bush and write the distance and drop in 1/4 moa clicks. I'd then mark them down in my EXCEL file on my laptop. I go back and immediately range it again but then I'd get the angle in deg, temperature in deg and barometric pressure in inches of MG. I'd then quickly transfer them to my SHOOTER program on my DROID and get the drop, again, in 1/4 moa clicks. My 1600-B was set up in the "1-4" or 1/4 moa mode.

I've been running cure #3 with my standard 1600 model and so started with it. These are pretty much level.

Curve #3
Yards- Shooter clicks- Leica clicks
138 1 0
149 2 1
156 2 1
230 7 6
256 9 8
303 13 11
413 22 22
440 25 24
470 28 27
472 28 28
520 33 33
531 35 34
553 37 37
693 53 56
725 57 61
802 67 74
841 72 81
852 73 83
873 76 87

These are at an angle.

Curve #3

15 to 32 deg up angles
Yardage- Shooter clicks- 1600-B clicks

176 2 2
235 6 5
275 8 8
352 15 15
383 18 17
524 28 27
678 46 50
714 49 52
839 62 70
870 64 72

Curve #2 ranged level

Curve 2
Yards- SHOOTER Clicks- Leica clicks
137 1 0
234 7 4
294 12 8
314 14 10
325 14 11
394 20 15
420 23 19
458 27 23
514 30 27
527 34 30
530 34 31
550 34 31
587 38 35
677 51 52
725 56 61
801 66 75
849 73 87
857 73 86

Curve #2 at an angle.

Curve #2

15 to 32 deg up angles
Yardage Shooter clicks 1600-B clicks

221 6 3
376 17 13
513 30 27
534 27 24
572 33 31
692 48 52
716 46 49
756 53 56
763 54 58
813 60 68
848 68 81
763 54 58
813 60 68
848 68 81

Right around 800 yds, things go askew and the Shooter and 1600-B both start to diverge apart from each other more than 1 MOA/4 clicks.

Alan

Last edited by Alan Griffith; 07-23-2012 at 11:41 PM. Reason: Edit/add
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  #23  
Old 07-25-2012, 08:55 AM
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Join Date: May 2010
Location: Alaska
Posts: 53
Re: Leica 1600B

Good info Alan, Thanks for posting it. Leica didn't include a curve that comes close to what I need. I compared curve #2 to shooter for a .284 160gr. Accubond at 2960 (I've verified Shooters data with actual drop and it's right on). #2 is the closest but not near close enough. It's flatter than Shooter to 600yds, at which point it matches, then drops drastically. I'm wondering where they came up with their choices for the curves. It's a good unit but I'm afraid their holdover mode will be used by very few shooters. I compared Shooters data for various loads for .338 Lapua and 33/378 (theoretical because I don't own one yet) and they all fall between Leicas #1 and #2, not close enough to use.
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  #24  
Old 07-25-2012, 10:09 AM
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Join Date: Aug 2005
Location: Mouth of Hobble Crk Canyon, Utah
Posts: 597
Re: Leica 1600B

I think for me, with curve #3, out to 550, I'm always within 1 click/1/4 MOA. This is for "fast" developing targets. Beyond that, I'll have to break out a ballistic program. At least I can still use the data off the 1600-B for input.

I wish Leica had given us an option giving us drop in MOA with a decimal point. Instead, they give us whole MOA, 1/3 MOA or 1/4 MOA in clicks. My old 1600 would at least give me, example, 6.25 moa instead of 25 clicks. Under pressure, my brain goes to mush.

My best friend is looking at this for his 6.5x284 with the 140 VLD @ 3050. Based upon your info, his may be too flat too.

Alan
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  #25  
Old 07-26-2012, 10:24 AM
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Join Date: May 2010
Location: Alaska
Posts: 53
Re: Leica 1600B

Im going to do a bunch of testing to determine how curve#2 compares with my trajectory in diff.conditions and angles to see if I can come up with a simple card that says if the 1600B says this number of clicks, then I hold this many. Its already calculated temp, air density and angle for you so most of the work's done. It would definitely simplify things in the field.
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  #26  
Old 08-22-2012, 04:31 PM
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Join Date: Aug 2011
Posts: 21
Re: Leica 1600B

Alan -

So are you saying that in the 1/4 moa read out the 1600-B is giving you true horizontal distance and not line of sight?

The other posts seem to make it sould like you either had to choose 1/4 moa read out or True Horizontal, but based on your charts it looks like to me that the 1/4 moa is giving you adjustment for true line of sight taking into consideration the angle of the shot?

What did you determine in your testing.

I know the 1600 will give you the angle but not the compensated distance.
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  #27  
Old 08-22-2012, 08:33 PM
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Join Date: Jan 2011
Location: Northern Utah
Posts: 830
Re: Leica 1600B

Quote:
Originally Posted by Chukar Plucker View Post
I know the 1600 will give you the angle but not the compensated distance.
The 1600B is supposed to give EHR (Equivalent Horizontal Range) but I can't mine to give it to me. I haven't played with it a whole ton but following the instruction manual I wasn't able to get it to display the EHR.

I've loved this rangefinder though! I've hit over 1800 yards multiple times ranging trees.... it's a huge upgrade from my old Bushnell
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  #28  
Old 08-22-2012, 11:34 PM
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Join Date: Aug 2005
Location: Mouth of Hobble Crk Canyon, Utah
Posts: 597
Re: Leica 1600B

Here is what I've seen with my 1600-B.

When set in the EHR mode, it would give both actual range and adjusted range.

When using the 1/4 MOA click mode it would measure actual range but give adjusted clicks where straight or angled.

I posted both ranges/clicks based on horizontal range as well as angled ranges.

Sorry if this isn't clear enough.

Alan
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