Quantcast
  1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Sight Set Question

Discussion in 'Competition Shooting' started by 9mmepiphany, Mar 12, 2013.

Thread Status:
Not open for further replies.
  1. 9mmepiphany

    9mmepiphany Moderator

    Joined:
    Dec 27, 2002
    Messages:
    19,029
    Location:
    northern california
    I usually just shoot whichever sights come on a gun...except Glocks...fairly well, with the only usual modification being blacking out any rear dots. But I've gotten to the point with my M&P9 that the factory sights aren't cutting it anymore...so I decided to replace them.

    I vaguely remember a mathematical equation to determine impact deltas corresponding to sight height deltas, but I'm having a brain fart...plus I've gotten pretty lazy over the years. So, onto my question.

    I've been looking at the 10-8 sight set which says that the correct pairing for the full size M&P is a .160" front sight (fiber optic)...I'm looking at a .100" width. So I happen to be on Speed Shooter's Specialties and found they they sell the 10-8 rear for a bit less...and I can save on shipping when combining it with other purchases.

    But they don't carry the 10-8 front sight set. What they offer are front sights by Dawson Precision..OK, they're a good company. But they don't offer a .160" front sight in the .100" width...they do have a .115" wide in .160" height

    What they do offer in the .100" width is .155" or .170".

    The question would be how much impact change would you expect, at 20-25 yards (IDPA), with a front sight that is either .005" taller or shorter?
     
  2. mgmorden

    mgmorden Member

    Joined:
    May 22, 2009
    Messages:
    4,596
    Location:
    Charleston, South Carolina
    Dawson Precision provides a page for it on their site that explains the equation:

    [​IMG]
     
  3. 9mmepiphany

    9mmepiphany Moderator

    Joined:
    Dec 27, 2002
    Messages:
    19,029
    Location:
    northern california
    Thanks.

    That was relatively painless, especially using Reverse Polish Notation in my HP calculator (yup, I'm old)

    So, I'm only looking at a POI change of .55" @ 20 yards. I'm thinking a little high is better than a little low...plus, who'd notice in a 3" group ;)
     
  4. waktasz

    waktasz Member

    Joined:
    Oct 30, 2003
    Messages:
    820
    Location:
    SE PA
    They will make you whatever height you need, assuming they already make the width you require.
     
Thread Status:
Not open for further replies.

Share This Page