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Posted: 11/26/2015 3:44:08 PM EDT
| I use the 50/200 zero on my 6920. Picking up my 6951 soon and will be putting an Aimpoint Comp M4 on it. At what distance is it suggested to zero the 9mm carbine for the most effective range? |
| 100 yards on the far side, but in my experience, I'm way off low, I am shooting subsonic 9mm out of a SBR (slow), so I think that would be normal. I have to have a high holdover with a 25 yard zero at 100 yards. I don't shoot off a bench very often with my QC10 SBR, but the one time I did to test the 25/100 zero, I was really off at 100 yards. I'm using an inexpensive Primary Arms RDS. Close in, 25 yards and less, it's great and bang on. |
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Do you know what the far zero is with the 25 yard near zero? Thanks for the response. Quoted:
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25 yards. There is a nice article somewhere explaining that reasoning, but I don't recall what it is. Do you know what the far zero is with the 25 yard near zero? Thanks for the response. Not off the top of my head, but you do realize your talking about a pistol round, right? The old site with the various charts are no longer up. Found some of the old info Zeroing a 9mm AR Carbine by LTC Chuck Santose 115gr 9mm Parabellum, (not 124gr 9mm NATO for this one.) Recommend you zero at 25 yards. With this zero the bullet is no more than an inch from line of sight (the dot or your iron sights) from about 15 yards to 100 yards. That is the bullet is under [inside, not lower] the dot at all times. You only need to hold "up a dot" at 125 yards and up 2 at 150. Comparison of 25 yard and 50 yard BSZs are below: Range 25 50 75 100 125 150 175 Yards 25 Yard Zero Path (LOS) 0.0 1.2 0.9 -1.1 -5.1 -11.1 -19.3 inches MOA Adjust 0.0 D2.4 U1.2 U1.1 U3.9 U7.1 U10.5 moa 50 Yard Zero Path (LOS) -0.6 0.0 -0.9 -3.6 -8.2 -14.8 -23.6 inches MOA Adjust U2.4 0.0 U3.4 U3.4 U6.2 U9.4 U12.9 moa D= Down, U=Up With a 25 yard zero your bullet peaks at 60 yards and is less than 1-1/2 inch above line of sight. Any target closer than 100 yards the bullet will strike somewhere within the 3.5 or 4MOA dot if you do your part. I don't like the 50 yard zero because the bullet is always low and is dropping like a stone past 75 yards. You'll have to hold up a dot at 100 yards and don't have any midrange advantage. For 147 there was still a good argument for the 25 yard zero. //--- Ah ha, found a copy of it, here you go. http://web.archive.org/web/20080124071549/groups.msn.com/TheMarylandAR15ShootersSite/9mmzero.msnw |
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<snip> Ah ha, found a copy of it, here you go. http://web.archive.org/web/20080124071549/groups.msn.com/TheMarylandAR15ShootersSite/9mmzero.msnw <snip> Yup, that bottom chart on subsonic 9mm pretty much matches my experience. I was shooting AE147 gr FMJ FP rounds so probably a little better BC. I was a little less than 7 inches below the POA at 100 yards. I had determined that with a 25 yard zero, I would be accurate enough between 5 - 65 yards . I looked at my notebook and at 10 yards I was about 3/4 inch low, zero at 25, and a little less than 1/2 inch high at 50 yards. At 75 yards I was about an inch and a half low. This is with a suppressed (TiRANT 9) SBR (4.5" ADCO Barrel). Yesterday, I was shooting 8" round steel targets at 100 yards offhand. High holdover (I just have a red dot so I don't know the exact MOA holdover) and was hitting the plate about 75% of the time (yup... not so good). I don't have much confidence in accuracy beyond 50 yards with this gun. It's a fun plinker, for sure, though, and I think good for SD/HD. |
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I zeroed my sights for 25 yards (with 147gr subs) based somewhat off the advice from the above article, and also based off the fact that it seemed like a good distance to shoot cans, bottles, zombies, etc.
Since zeroing, the gun has never seen a bag or a rest of any kind, and is only for off-hand shooting fun. At 100 yards it hits the 10" steel every time when aiming center of mass, but at around 50 yards it seems to shoot about 9" high. Anything I between those two also requires a little bit of a correction, but the fun part about this gun is shooting it, so if I have to shoot an extra round to hear the "ding", then that's alright with me. |
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