New .357 Sig conversion Barrel Shoots High

New .357 Sig conversion Barrel Shoots High

This is a discussion on New .357 Sig conversion Barrel Shoots High within the Defensive Carry Guns forums, part of the Defensive Carry Discussions category; I have a new Sig P229 in .40 caliber which shoots spot on and have recently purchased a .357 Sig conversion barrel. This weekend I ...

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Thread: New .357 Sig conversion Barrel Shoots High

  1. #1
    Member Array AlongcameJones's Avatar
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    New .357 Sig conversion Barrel Shoots High

    I have a new Sig P229 in .40 caliber which shoots spot on and have recently purchased a .357 Sig conversion barrel. This weekend I had to try it out and found out its shoots groups great, but elevation seems to be 1 to 1 1/4 inch below point of aim at 7 yards. Seems to make since with the .357 sig ammo velosity being 250 - 300 fps faster (than .40). Once I adjust the front sight higher its spot on as well and groups are less than an inch.

    I have a #8 rear site and a #6 front sight. Anyone know if I should go higher or lower numerically and which sight, front or back?

    Thanks!
    Jones
    Kahr K9
    Sig P239 9mm DAK
    Sig P229 .40 SAS GenII
    Sig P250 9mm


  2. #2
    Member Array Banzai Jimmy's Avatar
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    I believe Sigs in .357 SIG had #8/#8 f/r sights (at least my SP2340 did). You'll have to do the calculations to see how that changes things. :)

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    Member Array AlongcameJones's Avatar
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    Thanks Jimmy. I'm thinking if I change the front sight out to an 8, then it will shoot high with the .40 and spot on with the .357. Thanks!
    Kahr K9
    Sig P239 9mm DAK
    Sig P229 .40 SAS GenII
    Sig P250 9mm

  4. #4
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    Not sure its so much the barrel, but more the ballistics. The .357 is a flatter shooting round so you will see differences when you swap barrels. If you get out to greater distances you'll find the .40 being the low shooter.
    Rick

    EOD - Initial success or total failure

  5. #5
    Member Array AlongcameJones's Avatar
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    Quote Originally Posted by rstickle View Post
    Not sure its so much the barrel, but more the ballistics. The .357 is a flatter shooting round so you will see differences when you swap barrels. If you get out to greater distances you'll find the .40 being the low shooter.
    rstickle, I agree. More a caliber issue that will be corrected with a #8 front sight. Question is what color night sight
    Kahr K9
    Sig P239 9mm DAK
    Sig P229 .40 SAS GenII
    Sig P250 9mm

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