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Old 03-01-2010, 19:21   #2
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Join Date: Dec 1998
Location: Oldtown Idaho USA
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Converting your G23 40 S&W to fire 357 Sig ammunition is as simple as a barrel swap. All you need is a G32 357 Sig barrel. Drop it in and you are ready to go! There are no other parts or modifications required HOWEVER I personally recommend you also pick up the correct G32 357 magazine. This will help you avoid accidentally shooting 357 ammo out of your 40 barrel. Always use the correct ammo in the correct magazine to be safe.

Converting your G23 to fire 9mm ammunition is also just as easy. Simply drop in a LWD-239 barrel (or other manufacture) and use a G19 9mm magazine.... you are good to go. If you have a problem with a 9mm conversion barrel it will be related to the power of the 9mm ammunition you are using.

About 1% of our conversion barrels are affected by the poor performance of 115 grain ammunition. This rare failure is too low a percentage to make an issue, however it is one we are well aware of. The fix to resolve this issue is quite simple.

1 Clean and lube your slide and barrel.

2 Shoot 1 mag to 1 box of good quality +P or +P+ ammunition through the barrel.

3 Try the 115 gr ammunition again. If it runs... great! If you experience more failures you will have a couple choices to make.

Fix A Reduce the recoil spring weight. Try 11 to 13 lbs. Cost is about $25 for stainless steel guide rod and reduced power spring.

Fix B Shoot 124 gr or a better quality 115 gr ammunition exclusively. Your current 115 gr ammunition is no longer a valid option.

What causes this problem? Several issues come into play.

1 The 40 slide and (40 conversion) barrel is thicker than any standard 9mm slide and barrel. This extra thickness equates to more weight. The combined extra weight taps the energy of the "weak" 115 gr ammunition to its complete demise. It simply lacks in power and fails to reliably eject the spent round.

2 Every once in awhile a Failure To Feed/Failure To Eject (FTF/FTE) is caused by a fit issue. We resolve fit issues by pumping +P or +P+ ammunition through the gun. This hot ammunition provides extra pressure and the pressure will positively align any and all components. Once they are all aligned there is no longer a fit issue. The FTF/FTE is usually resolved.

FYI: there are SEVERAL brands of 115 gr ammunition that is known to produce failures in all standard Glock 9mm pistols.
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