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  #21  
Old 14 February 2019, 12:03
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Quote:
Originally Posted by gavin View Post
I've been using Frank Proctor's "50 yard zero at 10 yards" method for a few years on my ARs.
I've used this as well for quite some time with my ARs. We even had fancy BZO targets built for it. Zeroed at 10, and confirmed at 50. Worked well. But that's for that specific use-case.
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  #22  
Old 14 February 2019, 12:21
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I've pondered this question quite a bit in the past few years. I even considered opening a thread on the topic.

When I shot competition with the A2, I simply gathered dope from actual range experience. I zeroed at 25, 50, 100, 200, 300, 400, 500, and 600.
I wrote each rear sight adjustment on masking tape on the left side of the buttstock.

Later, with my own AR's set up for CQB, I initially zeroed for 100, and adjusted holdover for closer or longer.

Then I realized, when the heck am I likely to need my personal short AR's for 100 yards? Probably never. I finally settled on a 10 yard zero.
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  #23  
Old 14 February 2019, 12:24
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There is no "best" zero, it's all gear/sit dependent. When my wife asks why I have so many guns I always say "you don't play golf with just one club"
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  #24  
Old 14 February 2019, 12:46
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On my deer rifle...depending where I hunt. I usually sight in 1 1/2" high at 100 to get the most out of it.

A lot of urban talk about point blank range is wrong. As I always understood it, point blank range is when the bullet falls below the line of sight the 2nd time.
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  #25  
Old 14 February 2019, 13:56
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Quote:
Originally Posted by Polypro View Post
I would not recommend 25 Yards, unless using the standard GI Rotary Drum rear sight/procedure. I thought the page had an error when calculating 25, until I remembered that to zero at 25, you actually dialed it down a couple clicks, zeroed, and then clicked it back up to 8/3 - IMO 25 yards with a Red Dot would be a nightmare.

It's 25 so you dont have to walk so far to sharpie the holes and count squares.
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  #26  
Old 14 February 2019, 13:56
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As I always understood it, point blank range is when the bullet falls below the line of sight the 2nd time.


Huh?
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  #27  
Old 14 February 2019, 13:57
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My 375Win, 243's, 6.5CM are all sighted to be zeroed at 100.

My 257Weatherby is sighted to be nuts on at 200. That makes it real easy to calculate rise and drop out to 500.

But I use this http://ballisticapp.com/. I also have laminated load data cheatsheets with me.
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  #28  
Old 14 February 2019, 15:09
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Quote:
Originally Posted by havok88 View Post
On scoped rifles I like a 100 yard zero, but with red dots I prefer 50, because it has relatively little change out to 250
I do the same. It's not perfect I'm sure, but works great for me at the outdoor range I have access to.


Quote:
Originally Posted by Polypro View Post
IMO 25 yards with a Red Dot would be a nightmare.
I had the displeasure of running a zero range for my battalion where it was the first time everybody had an M68 (Aimpoint CompM2) on their M4s. This being the Special Troops Battalion (Engineers, MI, Signal, MP) nobody had boresighted the damned things. Nightmare is a soft word for how miserable that week was. It being the middle of August in the Fort Campbell heat didn't do anything to improve the mood, or the results of the shooters. That was before you get into any nuances of why 25 yards (or meters in this case) isn't optimal for red dot zeroing.
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  #29  
Old 14 February 2019, 15:41
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Quote:
Originally Posted by gavin View Post
I've been using Frank Proctor's "50 yard zero at 10 yards" method for a few years on my ARs.
Proctor is an IPSC Grandmaster. That's like Rob Leatham stratosphere....
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  #30  
Old 14 February 2019, 16:11
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Quote:
Originally Posted by Sharky View Post
It's 25 so you dont have to walk so far to sharpie the holes and count squares.
...AND that! Hahahaha!
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  #31  
Old 14 February 2019, 16:13
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Quote:
Originally Posted by Sharky View Post
Huh?
I know. Sounds weird. I read it in a hunting magazine about 35 years ago.

https://en.m.wikipedia.org/wiki/Point-blank_range
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  #32  
Old 14 February 2019, 16:20
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Quote:
Originally Posted by gavin View Post
I've been using Frank Proctor's "50 yard zero at 10 yards" method for a few years on my ARs.
Me too. It works.
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  #33  
Old 14 February 2019, 16:29
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You've probably heard it referred to as max point blank range Sharky. It's like zero your rifle at 200 and everything from muzzle to about 350 can be hit within an acceptable kill zone without making any sight corrections depending on the round. DOS is big on it in their DDM program.
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  #34  
Old 14 February 2019, 16:43
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Quote:
Originally Posted by Gsniper View Post
You've probably heard it referred to as max point blank range Sharky. It's like zero your rifle at 200 and everything from muzzle to about 350 can be hit within an acceptable kill zone without making any sight corrections depending on the round. DOS is big on it in their DDM program.

Ahh....okay now I am tracking. I thought he was off his meds again. I knew a few from CAG who used 150 for the same reason, trying to flatten it out. It does work.
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  #35  
Old 14 February 2019, 16:49
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I refilled my meds yesterday bro.
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  #36  
Old 14 February 2019, 16:57
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I SHOULD'VE said when the bullet CROSSES the line of sight the 2nd time. Varies by firearm. By sighting in my .308 an inch and a half high at 100 moves my max point blank range to around 326 yds or near that. The same point of aim can be used without using Kentucky windage. Generally, in a 4" box.
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  #37  
Old 14 February 2019, 17:00
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It's all math. Get every data point for your sitch, plug it in, and you will be *so* damn close.

Proctor's POA and POI dots are 1.9" apart on his target - go up to to the M855 50yd link and change the stepping to 10yds = -1.91" at 10 yards (for a 14.5"-16" at ~2850fps).

Switch to my gun/ammo and I'm -1.84" at 10yds. Good enough still, but if you want to be precise, you can make your own 10yd target with a ruler...and math.
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  #38  
Old 14 February 2019, 17:11
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Quote:
Originally Posted by Expatmedic View Post
But I use this http://ballisticapp.com/. I also have laminated load data cheatsheets with me.
On Android, Strelok Pro is the go-to:

https://play.google.com/store/apps/d...okpro&hl=en_US
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  #39  
Old 14 February 2019, 17:26
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Quote:
Originally Posted by Akheloce View Post

Then I realized, when the heck am I likely to need my personal short AR's for 100 yards? Probably never. I finally settled on a 10 yard zero.
Do you mean dead-bang, balls on AT 10yds? Or the 1.9" low at 10 yards?

If the former, that's a wild-ass trajectory

http://www.shooterscalculator.com/ba...+Create+Chart+
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  #40  
Old 14 February 2019, 17:35
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Quote:
Originally Posted by 1RiserSlip View Post
I SHOULD'VE said when the bullet CROSSES the line of sight the 2nd time. Varies by firearm. By sighting in my .308 an inch and a half high at 100 moves my max point blank range to around 326 yds or near that. The same point of aim can be used without using Kentucky windage. Generally, in a 4" box.
Here's what you're talking about so others can punch stuff in. This is probably where the 36yd Zero came into play. I just punched in the LC M855 data with M4 velocities, and it spit out the data at the bottom - pretty cool.

http://www.shooterscalculator.com/po...50&sh=2.5&ts=8
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