Smith & Wesson Forum

Go Back   Smith & Wesson Forum > Smith & Wesson Rifles and Shotguns > Smith & Wesson M&P15 Rifles
o

Notices

Smith & Wesson M&P15 Rifles Dedicated to the Smith & Wesson M&P-15 Rifles


Reply
 
Thread Tools Display Modes
  #1  
Old 10-19-2020, 06:02 PM
bigmtnman's Avatar
bigmtnman bigmtnman is offline
Member
Sighting in my AR questions Sighting in my AR questions Sighting in my AR questions Sighting in my AR questions  
Join Date: Feb 2003
Location: Northern Colorado USA
Posts: 2,345
Likes: 5,885
Liked 8,806 Times in 1,697 Posts
Default Sighting in my AR questions

In order to get my eye lined up properly with a scope on my M&P I had to use a 1" picatinny riser and high scope rings (it's a seasoned citizen thing). This put the center line of the scope 3 3/4" above the bore. If I have only 25 yards with which to sight it in, where would I want my group to print at 25 in order to be "on" at 100 yards. I do not need to be precise, just ballpark. I'm using Federal Premium 55 grain FMJ. Thanks for any help.
__________________
Y. B. Ord & A. Ree

Last edited by bigmtnman; 10-19-2020 at 06:04 PM.
Reply With Quote
  #2  
Old 10-19-2020, 06:34 PM
Eric300's Avatar
Eric300 Eric300 is offline
Member
Sighting in my AR questions Sighting in my AR questions Sighting in my AR questions Sighting in my AR questions Sighting in my AR questions  
Join Date: Oct 2018
Location: Michigan
Posts: 2,152
Likes: 2,123
Liked 7,164 Times in 1,609 Posts
Default

55 gr zeroed at 25 yds should put you pretty close to zero at 100 yds

A 50 yard zero, or roughly 1.3" low at 25 yards, also seems to be a good, useable trajectory––its highest point being about 1.5" high––at 125 yards–– then back on around 200 yards. IIRC a dead on 25 yard zero should get you within 2 inches of zero at at 100 yards
__________________
SIC SEMPER TYRANNIS
Reply With Quote
The Following 2 Users Like Post:
  #3  
Old 10-19-2020, 06:37 PM
Fishinfool's Avatar
Fishinfool Fishinfool is offline
Member
Sighting in my AR questions Sighting in my AR questions Sighting in my AR questions Sighting in my AR questions Sighting in my AR questions  
Join Date: Feb 2011
Location: Central PA
Posts: 4,546
Likes: 8,187
Liked 11,412 Times in 3,014 Posts
Default

Try this chart

Bore Scope Offset Calculator

Larry
Reply With Quote
The Following 2 Users Like Post:
  #4  
Old 10-19-2020, 06:53 PM
JT64 JT64 is offline
Member
Sighting in my AR questions Sighting in my AR questions Sighting in my AR questions Sighting in my AR questions Sighting in my AR questions  
Join Date: Feb 2020
Posts: 8
Likes: 2
Liked 5 Times in 1 Post
Default Sighting in my AR questions

I use 36/300 which is a Marine Corp zero and it works great for my M&P.
36 yard zero puts me right on the Money at 300


Sent from my iPhone using Tapatalk

Last edited by JT64; 10-19-2020 at 08:06 PM.
Reply With Quote
The Following 5 Users Like Post:
  #5  
Old 10-19-2020, 08:06 PM
Scharfschuetzer's Avatar
Scharfschuetzer Scharfschuetzer is offline
Member
Sighting in my AR questions Sighting in my AR questions Sighting in my AR questions Sighting in my AR questions Sighting in my AR questions  
Join Date: Jan 2014
Location: Puget Sound Area
Posts: 888
Likes: 39
Liked 2,388 Times in 649 Posts
Default 25 yard zero for 100 yards

With that height of the sight above the bore and using your 55 grain load:

25 yards: -2.5"
50 yards: -1.4"
75 yards: -0.55"
100 yards Zeroed
200 yards -0.75"
300 yards -7.2"

What might be a better option for increased flexibility; much like the military uses and referred to above is:

25 yards: -1.85."
100 yards: +2.4"
200 yards: +4.0"
300 yards: Zero

The above figures are rounded off to the nearest .1." They were calculated using the Ballistics AE app.
__________________
Keep your powder dry.

Last edited by Scharfschuetzer; 10-19-2020 at 08:14 PM.
Reply With Quote
The Following 3 Users Like Post:
  #6  
Old 10-20-2020, 01:19 AM
bigmtnman's Avatar
bigmtnman bigmtnman is offline
Member
Sighting in my AR questions Sighting in my AR questions Sighting in my AR questions Sighting in my AR questions  
Join Date: Feb 2003
Location: Northern Colorado USA
Posts: 2,345
Likes: 5,885
Liked 8,806 Times in 1,697 Posts
Default

Thank you all ... That is EXACTLY the information I was seeking.
__________________
Y. B. Ord & A. Ree
Reply With Quote
The Following User Likes This Post:
  #7  
Old 10-20-2020, 11:37 PM
Robspeire Robspeire is offline
US Veteran
Sighting in my AR questions Sighting in my AR questions Sighting in my AR questions Sighting in my AR questions Sighting in my AR questions  
Join Date: Jan 2016
Location: Tennessee
Posts: 641
Likes: 1,987
Liked 1,217 Times in 390 Posts
Default

Quote:
Originally Posted by bigmtnman View Post
Thank you all ... That is EXACTLY the information I was seeking.
Me too. Just what I needed also. Sighting AR in tomorrow
Reply With Quote
  #8  
Old 10-21-2020, 12:07 AM
walnutred walnutred is online now
US Veteran
Sighting in my AR questions Sighting in my AR questions Sighting in my AR questions Sighting in my AR questions Sighting in my AR questions  
Join Date: Jan 2007
Location: Ohio
Posts: 4,443
Likes: 777
Liked 3,019 Times in 998 Posts
Default

And if you are shooting well enough that you can measure the center of your groups consistently to the 100th of an inch, as in some of the above posts, you have my utmost respect. ;-D
Reply With Quote
The Following User Likes This Post:
Reply

Thread Tools
Display Modes

Posting Rules
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Some Help With Sighting In Concours Smith & Wesson M&P Pistols 15 11-24-2014 08:51 PM
M&P 9L sighting! Venenoindy Smith & Wesson M&P Pistols 8 03-03-2014 10:56 PM
Question about sighting/bore sighting HELLSING Smith & Wesson M&P15 Rifles 10 04-03-2013 09:51 AM
RRages Ultimate Sighting System Sighting Issues Gun Carpenter Smith & Wesson M&P 15-22 16 01-21-2011 07:55 PM
34-1 sighting lagavulin62 S&W Revolvers: 1980 to the Present 5 06-10-2009 11:15 AM

Powered by vBadvanced CMPS v3.2.3
smith-wessonforum.com tested by Norton Internet Security smith-wessonforum.com tested by McAfee Internet Security

All times are GMT -4. The time now is 07:57 AM.


Smith-WessonForum.com is not affiliated with Smith & Wesson Holding Corporation (NASDAQ Global Select: SWHC)