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Posted: 1/17/2006 2:34:22 PM EDT
Got a RRA 9mm Flat top with an eo tech. Gonna put a 5" barrell and suppresser on it. Shooting sub sonic 147gr FMJ. I figured 50 yrds would be the best but I would like to try 100 yrds.

What do you guys think is best? Thanks.
Link Posted: 1/17/2006 2:37:36 PM EDT
Link Posted: 1/17/2006 2:57:29 PM EDT
Yup. Looks like 75 yards. You'll be about 1.7" high at 50, and 4.3" low at 100 yards.

I used 1000fps as the velocity (didn't look it up, just assumed right at subsonic).

www.norma.cc/htm_files/javapagee.htm
Link Posted: 1/17/2006 2:59:47 PM EDT
[Last Edit: 1/17/2006 3:04:18 PM EDT by chippy77]

Originally Posted By NoAim:


I used 1000fps as the velocity (didn't look it up, just assumed right at subsonic).

www.norma.cc/htm_files/javapagee.htm



Close enough...950fps.

cool page, btw.
Link Posted: 1/17/2006 3:05:12 PM EDT
I used to sight my Colt 9mm in at 50 yds with no problems...


- rem
Link Posted: 1/17/2006 3:07:00 PM EDT
Link Posted: 1/17/2006 3:55:03 PM EDT
I agree with Shivan but if you want to check out what different zero distances will give you, check out this External Ballistics Calculator and roll your own zero.
Link Posted: 1/18/2006 4:27:10 AM EDT

Originally Posted By SHIVAN:
25yds...

groups.msn.com/TheMarylandAR15ShootersSite/9mmzero.msnw




where i sight mine
Link Posted: 1/18/2006 5:11:37 AM EDT
Thanks for asking this question - I was just wondering this myself, as I'm getting my new RRA 9mm upper from ADCO today.
Link Posted: 1/18/2006 5:27:37 AM EDT

Originally Posted By eklikwhoa:

Originally Posted By SHIVAN:
25yds...

groups.msn.com/TheMarylandAR15ShootersSite/9mmzero.msnw




where i sight mine




25 yds is where I sighted mine in
Link Posted: 1/18/2006 6:18:58 AM EDT
87 yards is the only acceptable distance!
Link Posted: 1/18/2006 6:42:04 AM EDT

Originally Posted By demigod:
87yards is the only acceptable distance!

Actually, in this particular instance, there is a logical answer to the question so the "87" rule is no applicable. Sorry.
Link Posted: 1/18/2006 6:48:47 AM EDT
50 yds
Link Posted: 1/18/2006 6:58:15 AM EDT

Originally Posted By Matt_B:

Originally Posted By demigod:
87yards is the only acceptable distance!

Actually, in this particular instance, there is a logical answer to the question so the "87" rule is no applicable. Sorry.



RIGHT!87 yards!
Link Posted: 1/18/2006 7:36:29 AM EDT

Originally Posted By eklikwhoa:

Originally Posted By SHIVAN:
25yds...

groups.msn.com/TheMarylandAR15ShootersSite/9mmzero.msnw




where i sight mine



+1

MN
Link Posted: 1/18/2006 9:20:48 AM EDT
25 yards.
Link Posted: 1/18/2006 9:23:32 AM EDT
25 yds is all you need and probaly where it will be most effective..anything farther than that upgrade to 5.56.
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