Just to give an idea of how impractical the proposed sighting scheme is . . .
http://www.box.net/shared/static/eghmuy6coc.jpg
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Just to give an idea of how impractical the proposed sighting scheme is . . .
http://www.box.net/shared/static/eghmuy6coc.jpg
I know the extreme trajectory differences and realize the limitations...but if you are dealing with Castle Doctrine and not legally allowed to engage (or want to) outside of your home except under the most Hollywood of conditions and inside home longest "realistic" shot would be 7 yards at some hiphopping, dancing and weaving, ducking and bobbing breakdancer with a knife...I'm not trying to be argumentative...but just playing the Devil's Advocate...having been in similar situation last year and armed with a handgun.
Most of my LE friends still use shotguns, MP5 or UMP for indoors work and have their ARs for outdoor work. I just wondered if some had AR rifles dedicated with different Zeros for different purposes...
I was thinking of Zeroing the RDS at 7 yd and having the irons lower 1/3 cowitness zeroed at 50yd in case I needed the long shot.
I have lived rural for most of my life and recently moved to an urban area and am trying to be realistic and responsible...the FAL is no longer the Go2 rifle:mad:
BTW, the movie reference was only intended for comic relief. Sorry, no more comedy.
I can't imagine where a 50 yard zero wouldn't do the job just fine, and that's what I was getting at with the extreme angles it would require for a 7 yards zero as graphically illustrated by Molon.
Zhurdan...no sweat, I can always use some comic relief:p
With an average optic height over bore in the 2" to 2.5" range, try out a 7 yard zero. Then take a 1 or 2 yard step forward or backward and see how big a difference there is from your original zero.
There is a good reason that a 25 or 50 zero is commonly used, even if the red dot is mostly seeing CQB distances. It is all about the math.
Pat Rodgers did an article on this in SWAT mag back in Feb 08. You may look it up if you would like more details, I will just use a few approx numbers here.
Using a 10 yrd zero here are the numbers
0 yrds -2.6
10 yrds 0
25 yrds +3.8
50 yrds +10
75 yrds +15.8
100 yrds +21.3
And the number keeps growing with distance, at 300 yrds it is up to +51.4 inches.
Here are some of his posted numbers with a 50 yrd zero
0 yrds -2.6
25 yrds -1.1
50 yrds 0
75 yrds +0.8
100 yrds +1.4
150 yrds +1.5
200 yrds 0
I've not done near the experimentations as Mr. Rodgers, but what I have done verifies his posted numbers.
I have shot and trained a lot at 10 yrds (and closer and farther)and have found no difficulties in simply holding approx 2 inches high at close range. In fact, with a little training, you would probably suprise yourself at how fast and accurate you can be.
Looking at the numbers above, there is no way I will use a 7 or 10 yrd zero. After trying different zeros for many years, I feel a 50 yrd zero is the best all-around option, by far.
I would certainly never knock anyone for doing what they are most comfortable with, I just wanted you to see a few numbers. When making a decision, I have found the more education I get, the better decision I make.
On another thought, If I find myself facing a serious situation in my home where the distances will be tight with doorways and furniture in the way, I will face it with a handgun. Maneuver and retention being a couple of reasons.
What ever you choose, good luck.
Sometimes I get the feeling that people that ask these weird questions about ZERO ranges just haven't been to the range and zeroed their rifles.
Seriously you have to have a zero of some kind and then shot at targets from contact to at least 200yards.
You would know emphatically, that a 25, 50 or 100 yards zero poses no problems for getting hits at very close ranges.
Get out and shoot!
Cameron
I compete 3 times a month. Evidently Pat R. thought it was a worthy enough "weird" question to write an article about it.
I'm actually always trying to make things more simple, not more complicated.
An excellent article on the topic:
http://www.lawofficer.com/news-and-a..._gun_zero.html
Thanks