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Improving Sigma accuracy

Discussion in 'Handguns: Autoloaders' started by Arkansas Paul, Mar 5, 2010.

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  1. Arkansas Paul

    Arkansas Paul Member

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    Hey guys. I've got a S&W Sigma 40VE and it hits consistently about three inches low and three inches left. This is from about ten yards. The groups are fine, I can keep them close, but the thing has fixed sights. Is there anything I can do? Can you put aftermarket adjustable sights on them? Any help would be appreciated.
     
  2. Kevin77

    Kevin77 Member

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    I had one with the same problem and the way I fixed it was by selling it and buying a 1911 with adjustable sights.
     
  3. retsub

    retsub Member

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    I drifted the rear sight on my SW9VE to fix my windage problem. I tapped on it with a screwdriver. Shoots a little high though.
     
  4. railroader

    railroader Member

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    Shoot it from a rest and if it still shoots the same contact S&W and get either a shorter front sight or a taller rear. Mark
     
  5. Arkansas Paul

    Arkansas Paul Member

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    Kevin, I understand and if I had the funds, that's what I would do. Then again, if I had that kind of funds, I wouldn't have bought a Sigma in the first place.
    Seriously though, I'm pleased with the way the pistol functions and it is consistent. I just didn't know if there were any aftermarket adjustable sights available.
     
  6. Onward Allusion

    Onward Allusion Member

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    I had the same issue with mine. The rear sight was too far to the left. Tap the sight to the right with a brass punch (NOT STEEL). Once you have it centering on paper, use loctite BLUE between the dovetailed rear sight and the slide. Let it seep in over night. Do it for both sides. It should lock in place.

    If the rear sight still drifts due to recoil, you can remove the sight and use a drill press and drill a tiny hole in the middle so that a hex screw can fit into it. Re-install the rear sight and screw in the hex screw. The hex screw will hold the sight in place due to its pressure against the sight & slide.

    As for shooting low, my recommendation is to adjust your sighting while shooting. A more radical approach would be to file down the front sight - like the old-timers used to do with their revolver's front blades.

    ALSO - you might be using too much finger on your trigger pull. You might want to let someone else shoot the Sigma before doing any of the above just to see if it's you and not the pistol.


     
  7. possum

    possum Member

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    this is a common issue, with the most common answer being shooter error. if you are hitting anywhere but where you want to hit in the biggest majority of cases it is shooter error in the form of trigger pull. i hate to say it and people hate to hear it but that is the fact of the matter.

    you are getting good groupings because you are doing the same thing everytime which is normally a good thing, however in this case, you not haveing a smooth even pull could be the form of this problem, explains why the rounds are all hitting in the same spot just not where you want them too.

    drifting sights, and adjustable sights will not fix marksmanship problems.
     
  8. Arkansas Paul

    Arkansas Paul Member

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    That very well could be the case possum. I've been shooting shotguns and rifles for over twenty years, but am a rookie when it comes to the pistolas. I've probably put less than 500 rounds downrange with them, so I have much to learn.
     
  9. panther22

    panther22 Member

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    Over on the S&W forum there is a thread by a guy who has installed a Glock fiber optic sight on his Sigma. It is a shorter sight and should bring your hits up. Adjusting the rear, as mentioned here, could fix your hits on the left.
    For me, this is a gun that takes some getting used to. I've been having the same results as you, but I'm getting better with practise.
     
  10. possum

    possum Member

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    yeah a handgun is much harder to master as compared to a rifle or shotgun, keep at it, you will get it.
     
  11. TheJeepGuy

    TheJeepGuy Member

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  12. Arkansas Paul

    Arkansas Paul Member

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    Thanks JeepGuy. That's very helpful. I wouldn't have thought of half that stuff.
     
  13. ol' scratch

    ol' scratch Member

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    Do what I did. Sell the piece of crap and buy a Rock Island 1911. That inproved my accuracy dramatically. If you don't like the .45, get a CZ75-also very accurate.

    Sorry to be insulting. I owned a Sigma and I couldn't hit anything with it. I started shooting the CZ and the 1911 and hit my mark.

    Edit--I read in an earlier post that you don't have the funds. My Rock Island cost me $380 new. I have seen them as low as $310 at gun shows (also as high as $500). I sold my Sigma with the mags for a little more than I paid for it and bought the Rock for an additional $40.
     
    Last edited: Mar 6, 2010
  14. mokin

    mokin Member

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    I've seen that happen with a friend's Sigma. I bet it is just the really long trigger pull. I can see where it would be easy to get too much "pull" on the trigger. He was ready to sell it after his first box of ammo because he shot low and to the left. I shot a magazine and did much better (I'm much more accustomed to DAO triggers). I suggested he practice with his double action 22 revolver for a while. It really improved his accuracy with the Sigma.
     
  15. possum

    possum Member

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    this does not solve the issue of bad technique. simply selling the gun in question makes no sense at all. The sigma's are plenty accurate enough, the same with other handguns, they are not race guns and they aren't meant to be however, they are plenty capable of accuracy when the proper use of technique is applied.

    i can't shoot this gun good so i am gonna sell it, buy something else, put adjustable sights on it, and a laser too of course becasue that always seems to make people shoot better heck i might as well just have someone else shoot it for me.
     
  16. rskent

    rskent Member

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    Dry Fire, Dry Fire, Dry Fire, Try to do it in front of a blank wall to force yourself (himself) to look at the front sight. After a few million pulls I bet that Sigma will shoot a bit straighter.
    Steve
     
  17. KevinR

    KevinR Member

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    That front sight is a mother to do anything with. It looks like it plugs into a hole and the tit sticking through inside gets melted to hold it in place. I think any and all corrections are designed to be done with the rear sight. Let us know what you end up doing please.
     
  18. roaddog28

    roaddog28 Member

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    possum is right. Most accurately errors are shooter errors. I bought a SW40VE about six weeks ago. I took the Sigma out to the range along with my Ruger Service Six 4 inch revolver. I shoot double action only revolvers and can hit at 10 to 15 yrds in the black consistantly with the Ruger. I started shooting the Sigma. It took me at least 4 mags of rounds before I started hitting the paper around the black. As I got used to the trigger more and more my accurately got better. I had trouble with the Sigma at first and I am used to shooting double action only which is the type of action the Sigma is. Double action only guns take awhile to master the long and heavier trigger. But with practice you can shoot the Sigma more than accurately enough for any SD situation. The Sigma is not a target shooter. The Sigma is a combat pistol much like a Glock or other pistols. I feel the Sigma is safer because of the longer trigger. Practice, and give the Sigma a chance. If you feel the your Sigma has accurately problems find a person that is used to shooting double action only revolvers. I bet that person will not have problems with accurately after they put a few mags through the Sigma.




    Good luck,
    roaddog28
     
    Last edited: Mar 7, 2010
  19. BossHogg

    BossHogg Member

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    I think just about everyone shoots the Sigma low left at first. It's just getting use to the trigger,no big thang. It's a great SD,or truck gun,goes bang every time. Fun,fun,fun in the sun.
     
  20. Arkansas Paul

    Arkansas Paul Member

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    Oh, I have no problems with it other than that. I'm actually glad that the general concensus is that it's me. If it's the case, and I suspect that it is, I won't have to spend a hundred bucks on adjustable sights, and I'll have an excuse to go to the range even more. (Like I needed one)
     
  21. ol' scratch

    ol' scratch Member

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    Last edited: Mar 13, 2010
  22. dalegann

    dalegann Member

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    Hey Paul,
    The consensus I get here is that you or the gun suck!
     
  23. Cornhusker77

    Cornhusker77 Member

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    When I first got my SW9VE, i shot low and left.
    Right after I got it, I used it to qualify for my CCW.
    The instructor had us warming up, doing a little bullseye shooting, just kind of messing around before the actual qualifying.
    I was shooting low and left, and I told the instructor my sights were off.
    He walked up to the target, cut a slit in it and put a playing card in the slit.
    Then he said "Let me see your gun"
    I handed it to him, he racked one in, looked down the sights, pulled the trigger and split the card.
    He unloaded the gun, handed it to me and said "there's nothing wrong with those sights."
    After that, I shot better :)
    I kept the playing card, it's in my gun cabinet and it reminds me every day that my Sigma shoots straighter than I do.:D
    Oh, and the trigger does get better.
     
  24. doc540

    doc540 Member

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    Should the trigger be a little rough or crunchy, you can call Sigma, and they'll email a shipping label on their dime.

    Don't tell them it's "stiff", just "rough".

    They'll smooth it up, make a dramatic improvement in the way it shoots, and ship it back within 2 weeks, again on their dime.

    We've owned three, had all three done, and they shoot dependably and accurately.
     
  25. dwhite

    dwhite Member

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    Ditto the low and left with the Sigma. Took me a couple hundred rounds to really figure out the trigger but it (I) now hit where I point it. Mine seems to be regulated for 180 grain bullets also. Give it some time.

    Sigma was my first pistol. I've always shot DA revolvers so the trigger was familiar. Also, now that I've mastered the Sigma, I can shoot my buddy's XDm 9mm better than my buddy can. Master that Sigma trigger and you'll shoot everything better.

    All the Best,
    Dwhite
     
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