Zeroing red dot for 9mm carbine

[shibbershabber]

Hey all

I just put together a 9mm AR carbine and am wondering what the ideal zero would be.

16" bbl, using an optic with a 4 moa dot.

Ive read 25m is ideal... anyone have actual experience?

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[Member 34319]

50 yards is what I use for my PCCs.

 

[jordanka16]

50 yards is what I use for my PCCs.

I use 50 yards as well, 25 is too short, they have more range than you might think.

 

[Certaindeaf]

Think of it as a more powerful .22.. kinda the same trajectory so 50 yards is about right.

 

[Member 34319]

I've chrono'd my 16" 9mm. It get about 1250ish at muzzle with 115 factory ball rounds. Anywhere from .5" to 1.25" of drop at 50 yards. Roughly 10" drop at 100 yards.

If your looking for a straight line zero. IE no drop. I'd say 30 yards is about right for a flat trajectory.

I still recommend 50 yards though. You will be slightly high in close, but it isn't much if your optic is mounted high from the bore.

 

[MrMillspecer]

25 yards is good to get going , adjusting buis and reddot . You should know how where they hit at close range like 10 yards as well. But , I always go to 50 and many times the vertical is super close or the same as 25 but i can fine tune the windage. I would like to try 100 yards just to see holdover or clicks up on the pc9.

 

[shibbershabber]

Sounds good.

All I ever hope to do is ring a 10" plate at 50-100....... now I just need time to actually get out and hang some targets

 

[jordanka16]

Sounds good.

All I ever hope to do is ring a 10" plate at 50-100....... now I just need time to actually get out and hang some targets

View attachment 506939

Should be able to do that easy, I break clays with mine at 50 yards. Next time I go to the range I'm going to try 200.

 

[BWH]

I zeroed my pcc at 40 yds on paper at home, it breaks clays dead on at 100. .....and its a hipoint. just sayin'
it is like a hi powered 22. dot sight will never have the finese of good cross hairs. As long as I can clang steel, all is good

 

[308]

The Colt manual says to zero at
25 meters

 

[Member 5605]

50.

 

[shibbershabber]

Alright...

Took it out and got on paper at 50 yards.
The spread was horrendous though. Like 10"

Im sure I was part of the problem, but I was sighting in a freshly built 7.62x39 AR too and I had better groups.

Is there a Twist rate/bullet weight consideration on these like with other rifle rounds? Is the 4MOA dot just too big to get a better grouping?

 

[jordanka16]

Alright...

Took it out and got on paper at 50 yards.
The spread was horrendous though. Like 10"

Im sure I was part of the problem, but I was sighting in a freshly built 7.62x39 AR too and I had better groups.

Is there a Twist rate/bullet weight consideration on these like with other rifle rounds? Is the 4MOA dot just too big to get a better grouping?

Standard twist is 1:10, doesnt make too much difference though, all 9mm bullets are short. I've got better accuracy with HP bullets out of a carbine, I think moving the center of mass rearward helps. 4 MOA dot is fast but not conducive to accuracy.

Factory ammo? What kind?

 

[LSWC]

I zeroed at 25 yards and am good to 100.