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11/1/2011 3:29:16 PM EDT
im looking for optics for my long range AR, i have been looking at the M223 in rapid action turrets and the mark ar both in i4-12 any one use either.
11/1/2011 8:21:21 PM EDT
[#1]
I have the M223 1-4 on my LR308. Overall very happy with it. Glass is clear, and I have not noticed any optical abberations at 4x...but I also haven't hunted for them.

I would prefer capped turrets so that there is no chance of zero getting shifted by improper handling or transport.
11/1/2011 8:40:36 PM EDT
[#2]
I mounted the M-223 2-8x32 on my m4, and at 400 yards it wasn't even in the ball park.  The Nikons are ballistically matched to 55 gr. polymer tip bullets at 3240 fps.  Check your re-loading manuals, you cannot get close to this velocity without going to a 24" bolt gun.  The fastest I've been able to push a 55 gr. ballistic tip out the end of my M4 is 3049 fps, and I'm flattening primers and showing signs of excessive chamber pressure to achieve this.  For a scope that was supposedly developed especially for the AR-15 platform, I am not impressed.
11/2/2011 3:42:20 AM EDT
[#3]
what size barrel are you using? You aren't gonna get close with a 16" carbine sized barrel. That's one probem the M4's have is that pencil 16" barrel that suffers in muzzle velocity. I have a 20" and mine pushes at 3200 fps. Also you using .223 or 5.56 ammo?
11/2/2011 3:45:09 AM EDT
[#4]
I have a M223 3-12x42sf with the BDC reticle and it works great. BUT I have a 20" barrel that can achieve the required 3240 fps. Anyway just wanted to give my opinion, I love my Nikon, actually returned the Leupold and went with the Nikon :) Both are EXCELLENT choices for long range shooting but I prefer the Nikon, sharp and bright picture with precise holding points. Also you can pick up the Nikon for around $400 dollars, at least where I live, which is quite a bit less than the MARK-AR. Nikon also includes the anti-reflective objective lens cover so whatever "prey" you are stalking cannot spot you out because of the glare off of your big 42mm obj. lens.
11/2/2011 3:49:33 AM EDT
[#5]
Oh yeah, one more thing to remember is the MARK AR does not have parallax adjustment on the side where it is handy to adjust it, the Nikon does, the MARK AR is on the objective lens where the shooter has to get out of firing position to adjust.
11/2/2011 5:13:31 AM EDT
[#6]
You should start shooting 5.56 ammo since it has a greater chamber pressure and greater muzzle velocity.
Barrel
LengthVelocity (55gr M193)
20" barrel - Muzzle Velocity is 3259fps using standard XM193 5.56 NATO cartridge
11/2/2011 6:04:40 AM EDT
[#7]
My Mark AR (3-9 mil-dot) has the yardage etched on the turret like the rapid action turrets, but also standard moa. That was a huge plus to me.
11/2/2011 6:32:49 PM EDT
[#8]
why dont you check out the weaver 3x10x40 tactical that mid-way sells . it has tactical target knobs that are resetable and a mil/ mil reticle. then it dont matter what bullet weight or velocity you have . find your dope and dial it in no matter if you are shooting a 223 or a 300 mag . plus they normally are on sale for 299.00 . the glass is pretty nice and clear and mine tracks perfect , always returning to zero.
11/2/2011 7:53:57 PM EDT
[#9]
I am using hand loads, tweaking and experimenting with different powders trying to get close to 3240 but that is not gonna happen.  I have not yet put the same loads through my 20" gun to see what the velocity difference is.  Right now just trying to get the m-223 dialed in on the M4.  Rounds are off 10" @ 400 yds. give or take.  Not nearly close enough in my opinion for a scope built specifically for the AR15 platform.  Perhaps Nikon should offer turrets calibrated for 55 gr. polymer tips at say 2900 for 16" barrel versions since most people I know buying ARs right now are buying 16" versions.
11/2/2011 9:49:48 PM EDT
[#10]
black70

Go to Nikon Hunting and launch Nikon Spot On:

http://www.nikonhunting.com/spoton/

It will allow you to enter those specs. Unfortunately you can't order turrets but it will give you sight pictures.

11/3/2011 4:40:18 AM EDT
[#11]
Would a 50 grain boat tail get you closer?   I'd not known the bdc was set for polymer tipped.   Would bet most folks arent shooting them regularly.  From what i read 4 more inches is worth no more than120 fps...
11/3/2011 9:19:33 AM EDT
[#12]
5.56 NATO out of a 20" barrel shoots at 3295, quit using underpowered .223 ammo. It's gonna be hard to get .223 at 3200 fps.
11/7/2011 11:04:08 AM EDT
[#13]





Quoted:



black70





Go to Nikon Hunting and launch Nikon Spot On:





http://www.nikonhunting.com/spoton/





It will allow you to enter those specs. Unfortunately you can't order turrets but it will give you sight pictures.





The Nikon SpotOn Ballistic Match program works great!  I have used it to hit 8" steel plates out to 400 yards with surprising accuracy.  





Chase B.    
 
 
11/7/2011 1:14:57 PM EDT
[#14]
Quoted:
Oh yeah, one more thing to remember is the MARK AR does not have parallax adjustment on the side where it is handy to adjust it, the Nikon does, the MARK AR is on the objective lens where the shooter has to get out of firing position to adjust.


I have both types and prefer the A/O.  VX III and MK IV  with side focus, VX II and FX III with A/O.  I can reach the A/O just fine, markings on the things are just reference anyway.
Eye relief is another point which should be looked at. The Leupolds I have need to be mounted foreward. Don't know about the Nikons.
Nikons I have looked at with their circular bullet drop  rings offend my eye. Leupold reticles are worth the eye relief [on AR's ] aspect.

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