Any negative results using an after market barrel in the G20, gen 4

[Kenk]

Morning,
Have any of you found that the factory G20 barrel out shines, say the KKM barrel when it comes to certain bullet types?, or situations that an after market barrel could actually be dangerous. I have found my KKM factory replacement barrel to function flawlessly so far, but just wanted to ask the experts
Thanks

Ken

[seaswol]

Have any of you found that the factory G20 barrel out shines, say the KKM barrel when it comes to certain bullet types?
NEVER

, or situations that an after market barrel could actually be dangerous.
NEVER EVER

I have found my KKM factory replacement barrel to function flawlessly so far
ALWAYS

, but just wanted to ask the experts
Thanks

Ken

My two KKM barrels, one for my G20 and another for my G40 always outshines the factory with any bullet and any of my reloads.

Chris

[Spudmeister]

Have any of you found that the factory G20 barrel out shines, say the KKM barrel when it comes to certain bullet types?
NEVER

, or situations that an after market barrel could actually be dangerous.
NEVER EVER

I have found my KKM factory replacement barrel to function flawlessly so far
ALWAYS


, but just wanted to ask the experts
Thanks

Ken

My two KKM barrels, one for my G20 and another for my G40 always outshines the factory with any bullet and any of my reloads.

Chris

My answer has to be more generic to aftermarket drop in barrels not including Lone Wolf.  Like Seaswol says, I am as problem free with aftermarket barrels (9mm, 40, 45 & 10mm) as with OEM Glock barrels.  That is with quite a mix of jacketed, hard cast, and coated bullets.  Not that everything has worked but that the barrel was not the cause or cure.  Frankly, I am kinda surprised at that since aftermarket barrels are supposed to have tighter tolerances.  No matter.  I can't tell a difference in any way except accuracy. Once in a long while I can come up with a load that shoots poorly enough for me to notice with the OEM barrel.  That has never happened with any of my aftermarket drop in barrels. 

To offer some perspectice...  I took a 235 lb bore 4 years ago with a G20 and a 5.3" Storm Lake barrel.  It was very accurate and put a 200gr WFN bullet out at 1,235 fps.  In a little over 6 weeks I head to TX for a hog hunt.  The handgun this time will be a G40 shooting a 200gr WFN bullet at 1,250 fps from the OEM barrel.  It too is very accurate.  I missed a nice sow last year with a G29 with a 4.7" KKM barrel.  Wait... maybe I should blame the barrel for that miss.. 

[tommac919]

I personally don't know many people that can out shoot commercial ammo in a stock G20....maybe one or two.

The Glock was meant to be loose in the tolerances for reliability , it wasn't designed to be a tack driver.
Defensive shooting is more of a 6-8 inch circle over a 1-2 inch grouping

[Kenk]

As I mentioned in my original post, the KKM barrel has performed flawlessly. My concern was the tight tolerances when loading, say Rim Rocks  220 gr FP. Thanks for everyone's input, looking like my concerns were unfounded
Thanks

Ken

[tommac919]

My concern was the tight tolerances when loading

Yes, a valid reason....
My G20 cases come out at .432-.433 for most of my loads
While my Sig 220/10mm cases are in the .426-.427 range.

May not seem like much, but it is much easier on the brass with a tighter chamber. Brass will not get brittle from working it as fast.

[Kenk]

Thanks tommac

[erdyalx]

After having issues with several after market barrels in Sub zero weather. I went back to factory barrels and heavier springs when needed. No further issues. No net loss in accuracy. I powder coat my bullets and they work great.

Sent from my XT1254 using Tapatalk