KKM is good stuff. I have a .40 to 9mm for my G35, and man does it shoot nice. I don’t even have to change the extractors, hell I’ve even used the .40 mags loaded with 9mm and it runs 100%. Can’t go wrong with KKM.

 

That is music to my ears. A lot of the guys on here said KKM’s are good stuff.

So you can load .40 mags with 9mm rounds?!

 

I have one of those puppies and it's very accurate.

 

Which rounds give you the best accuracy?

 

I have a G-20 with an aftermarket Lone Wolf .40 4.6" barrel and really prefer it over the 10mm. A reasonable load of Power Pistol (5.8 grs.) pushes 180 gr. coated bullets at 984 fps. A very pleasant to shoot load, The standard deviation (SD) was an outstanding 2.

In comparison, 10mm Armscor 180 gr. was 1166 with a 15 SD, and Freedom Mun. 180 was 1009 with a 23 SD. 10mm 180 gr. Power Pistol reloads gave me 1122 fps, SD of10.

The 10mm is only 138 fps faster than the .40 . Not a whole bunch, plus the .40 cases are a lot cheaper and way more available.

I found that .40's work fine in 10mm barrels except the barrels should be cleaned regularly, though no big deal.

Anyhow, enjoy.

 

For paper punching and pleasant to shoot I would concur, however some nice Underwood ammo at 1500-1700fps and 750fps is nothing to sneeze at though dang sure more expensive


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I have the Lone Wolf .40 barrel for my G29. Great option to have.

 

I also have a LW 10mm stainless for shooting lead. I like it a lot.

 

Now I want I want a KKM 40 S&W barrel.

 

One thing to consider with conversions is fixed sights. I bought a .357 Sig barrel and spring for my .40 239 Sig. The groups were much lower and to the right.

 

I have one for mt G22. .40 to 9mm and it works great, no extraction problems and my G22 is 2nd gen, old like me

 

You will love that KKM barrel. Have one in .40 to 9 and 40 to .357. Both function really well and make me more accurate on target.

 

I have a couple of .357 s I g I have a .40 conversion barrel for. I reload 40 so it works out nice. What are the conversion barrels going for these days?

 

$242 shipped

The Glock 20 threaded .40 conversion is not on the KKM website but they do sell them. The part number is G20D1T2.

 

My KKM .40 barrel was more accurate than the stock 10mm barrel.

 

I’ve never competed in an official event but it’s something I would like to try.

Good to hear positives about the KKM barrel!

 

Got my KKM barrel today! Can’t wait to try it out!

 

 

 

If going g32 to g23 conversion how will with aim be?

 

Aim is the same. Point of impact might be a little off. Pretty sure the 23 uses a slightly taller rear sight than the 32, but anything 21' and under, the POI shouldn't be off by much, at all. Where you'd really see it is 25 to 50 yds, if you used a G32 with a .40 conversion. With a zero at 25 yds with the G32 stock sights shooting Sig ammo, or any zeroed sights, FTM, the 40 S&W would be a tic low at the same distance, hence the slightly taller rear sight for the G23. Now, when I say a tic low, that is what it is...a tic.

eta - something to keep in mind is some sight makers sell the exact same rear sight for 9mm, .40, and Sig...no height diff.

 

I heard they might have reliability issues for conversion barrels and shouldn't be used for self defense. I had a hard time believing it. It was on a gun review website showing top conversion barrels.

Thoughts? Do I order lwa conversion 40 to 9 or kkm?

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Aim is the same. Point of impact might be a little off. Pretty sure the 23 uses a slightly taller rear sight than the 32, but anything 21' and under, the POI shouldn't be off by much, at all. Where you'd really see it is 25 to 50 yds, if you used a G32 with a .40 conversion. With a zero at 25 yds with the G32 stock sights shooting Sig ammo, or any zeroed sights, FTM, the 40 S&W would be a tic low at the same distance, hence the slightly taller rear sight for the G23. Now, when I say a tic low, that is what it is...a tic.

eta - something to keep in mind is some sight makers sell the exact same rear sight for 9mm, .40, and Sig...no height diff.

I did see that some make the same heights for all three. Not really understanding that but I guess it's what you get used to and learn to use.

 

I did see that some make the same heights for all three. Not really understanding that but I guess it's what you get used to and learn to use.

My best guess is at self defense distances, all 3 calibers are going to hit the same spot. Even out to 15 yds it's going to be very close. It's just not a distance where bullet drop begins to show up.

 

Thanks. To be honest, when I go to the range I do not push the target out past 15 yards. I see others going as far back as possible with handguns but if I am shooting at someone at those distances or farther I hope I have my 357 sig and not my 9mm. A war will have definitely started, in that case.

Thanks for the tip.

 

So...to get this straight. It's possible to have a Glock 20 or 21 and buy a conversion barrel to make it a 40cal or 357sig or a 9mm?? I had a G21 in the '90s and loved it. If this is possible I'll be buying a G20 or G21.

 

So far as the G20 is concerned, you can get conversion barrels for .40, .357 SIG, and 9x25 Dillon, not 9mm Luger.

 

I have the 10MM to 40 S&W conversion barrel from Lone Wolf for my 29. Runs 100% and shoots great.

 

WOW thanks, guys, I'll be on the hunt.

 

Anyway, looking forward to putting some 180 grain .40s through the G20 at the range.

I'm starting to lean towards a 10mm conversion barrel for one of my 41's. It would be the 6" so I can thread it to install a brake. For range fun and bragging rights, only, but if it proved to be reliable with middle weight 10mm ammo, I could see taking a pig or two with it.