Freakshow10mm: How about that G30/10mm Conversion?

[WalterGA]

I put about 1000 rounds through a G21 with the KKM conversion barrel and was never able to get reliable extraction. I tried all the "tricks" suggested by the "inventor" of the conversion. (A German company's been making 10mm conversion barrels for Glocks for years.) I tried every recoil spring and bullet weight/load combination that I could think of.

It'd be interesting to see if you get reliable function over the next 1000 rounds or so.

[freakshow10mm]

I'll keep you posted. I'm running some loads up in my Pro Carry 10mm and the G30-10mm for ammunition sales. Finding what works and sending some sample rounds to Hodgdon for pressure testing.

I was talking with a guy there at the range last week when I shot for too long. He was interested in my bullets and future ammunition. Had to handle business. To bring you up to speed in case you hadn't read elsewhere, I started a bullet casting business and will be selling ammunition soon.

Only got to fire about a dozen rounds. All were fine, pressure wise, and ejected within 10 feet. Worked up to 135gr Nosler/17.5gr #9 and 200gr XTP/12.5gr #9. The only issues I had was that it wouldn't chamber my .401-sized lead; probably need .400, slugged it out at .399.

I'm running a Wolff guide rod with 21# spring. I run a KKM .45 Auto barrel in my G30 24/7. I also shoot 45 Super in it, which is why I got the rod/spring setup.

I got the 10mm barrel mainly for range duty. If it proves reliable as my G30 does, I might roll with that. Also got it for load work ups and bullet designs that will work in Glocks. Right now I pack my Pro Carry 10mm, loaded with handloads of course.

I wish the baseplate of the G29 mag was like the G30 mag-that is perfect. Anything come close? Pearce?

[918v]

So the issue is with the extractor hook being too short to grab the 10mm rim? You may never be able to rectify this without machining a custom unit with a longer claw. If you install an eccentric barrel, you will screw-up the feed geometry.

[freakshow10mm]

I think that is the issue, the extractor. My G30 (FHS prefix) has a born on date of 2003 and has the LCI. Will be interesting to see.

[WalterGA]

My lousy 10mm conversion barrel experience started out with my believing the "promoter" of the conversion barrel that it was a simple drop-in. Then, when I e-mailed the guy, he said, "well, file a little off the front pad of the extractor." Now how the hell would he have known to file the front pad of the extractor, if he hadn't experienced the same problems? He then referred me to another guy with the conversion barrel, with the "promoter" telling me that the other guy's unit was "100%." When I contacted the other guy, I find that he's having the same kind of horizontal stovepipes that I experienced.

I was in contact with three or four guys who were also having problems. I wound up swapping the conversion barrel for a .45ACP KKM barrel that I didn't need, but at least it wasn't a total loss.

If you slip a 10mm case up under the .45 extractor from the bottom, as it would normally feed, you'll find that there's "0" extractor tension. Plus, the cut in the .45 breechface allows for "wiggle room" of the 10mm case.

Could be that a specially-designed extractor would work; however, when I spoke with Kevin, @ KKM (who is keely aware that the conversion doesn't work), he opined that he certainly wasn't willing to invest in designing a new extractor.

I wound up buying a lnib G20, which is what I should have done in the first place. I got a good deal on a G20 upper from the gun parts listings on GT, but let a friend have that deal.

[freakshow10mm]

Interesting. I'll have to slip a case in my slide later on today.

I got a dealer discount from KKM for the barrel so I saved a little there. I'm sure I could flip it easily and break even on GTs 10 Ring.

[gokyo]

I am really interested in hearing about the problems with making 10mm work with a 45ACP breach face and extractor.

I had thought about getting a 10mm conversion barrel and a glock 21. But I could not convince my self that it would work reliably.

[WalterGA]

Interesting. I'll have to slip a case in my slide later on today.

I got a dealer discount from KKM for the barrel so I saved a little there. I'm sure I could flip it easily and break even on GTs 10 Ring.

Could be that you'll get yours to work! I never tried the G30 conversion, and none of the other guys who were having problems were using the G30 conversion, either.

[918v]

Have you heard of the HK USP 357 Sig problem? The USP Compact acommodates the conversion with ease. The USP Full Size has all kinds of feeding problems.

Perhaps the G30 will work just beacuse it is a different system in terms of dynamics.

[freakshow10mm]

Have you heard of the HK USP 357 Sig problem? The USP Compact acommodates the conversion with ease. The USP Full Size has all kinds of feeding problems.

Perhaps the G30 will work just beacuse it is a different system in terms of dynamics.
The USP conversions I saw on LTW and TFL a few years ago were all full size, had the ejection ports enlarged, and were running either S-TI/VI mags or Para P16 mags. Can't recall if there were feeding issues.

I converted a Para P16 to 10mm. Sold it. Now got a Pro Carry in 10mm. Love it.

Probably the design of the G30. Glocks are some simple, effective machines.

Here's a pic I snapped a few minutes ago. 10mm round sitting on a .45 breechface in my G30 slide. Hopefully the extractor/groove relationship will be apparent. ETA: Yup. Definately a gap there.

http://img.photobucket.com/albums/v239/freakshow10mm/Glock/P3100004.jpg

[Steve Koski]

Put a 45 case in there and let's see the gap. (the gap, not the GAP)

[WalterGA]

Put a 45 case in there and let's see the gap. (the gap, not the GAP)

Koski: I believe you'll find that there'll be no gap, with the .45ACP case. The extractor will properly hold the .45ACP case in position in the breechface cut.

[WalterGA]

So, how about a pic of that .45ACP case under that .45ACP extractor?

[freakshow10mm]

http://img.photobucket.com/albums/v239/freakshow10mm/Glock/P3110005.jpg

[MONTEGOD7SS]

Now that's a proper fit. Just my opinion but I would just go with .45Super in the G30 if you want big gun power in a small gun and let the 1911 do the 10mm work.

[freakshow10mm]

I shoot that too. With my G30 I can go 10mm, 45 Auto, or 45 Super.