ES13Raven Posted May 17, 2014 Share Posted May 17, 2014 (edited) After reading great reviews on the KKM from so many people, I got one for my G34 Gen4. I took it to the range today and want to see if my groups would improve, and if it ran my ammo OK. I shoot Atlanta Arms & Ammo 9mm 147gr reloads (130pf on a G17). I shot 100 rounds from a bench rest at 25 yards, and took precise trigger pulls. I shot about 40 from the Stock Barrel and 60 from the KKM. I took about 5 shots to the berm with the KKM before shots on target. Here is my best group from the Stock Barrel (12" target): Here is my best group from the KKM (12" target): I was aiming for the bulls-eye on all shots. It seems to me, my G34 likes the Stock barrel better. Anyone else experience this? Edited May 17, 2014 by ES13Raven Link to comment Share on other sites More sharing options...
Dkrad1935 Posted May 17, 2014 Share Posted May 17, 2014 Can't tell from the picture which group is better. But the Kkm group seems high. Can u adjust your sights? Link to comment Share on other sites More sharing options...
ES13Raven Posted May 17, 2014 Author Share Posted May 17, 2014 Can't tell from the picture which group is better. But the Kkm group seems high. Can u adjust your sights? Besides the one flyer - the stock barrel grouped better. I don't have adjustable rear - I have the Sevigny sights. They seem dead on for the stock barrel. Link to comment Share on other sites More sharing options...
AJE Posted May 17, 2014 Share Posted May 17, 2014 (edited) Thank you for posting this. I have toyed with the idea of getting an aftermarket barrel but never really thought it would make a noticeable difference in accuracy to the point that most people assume it would. Edited May 17, 2014 by AJE Link to comment Share on other sites More sharing options...
ES13Raven Posted May 17, 2014 Author Share Posted May 17, 2014 Here is another one from the KKM (12" target): Link to comment Share on other sites More sharing options...
JBP55 Posted May 17, 2014 Share Posted May 17, 2014 You will probably get slightly better groups with a KKM barrel vs. an OEM barrel in a Gen 3 Glock. It will be more difficult to improve on the Gen 4 Glocks which have a tighter lockup and are slightly more accurate than the Gen 3 Glocks. Link to comment Share on other sites More sharing options...
Steve RA Posted May 17, 2014 Share Posted May 17, 2014 You might try a slight variation on your load, groups look similar but both could use some improvement in group size. Link to comment Share on other sites More sharing options...
blairmckenzie1 Posted May 17, 2014 Share Posted May 17, 2014 I have 4 KKM glock barrels and all of them shoot great. not sure what is happening with yours. i would try a different load and if that didn't help contact kkm. Link to comment Share on other sites More sharing options...
ES13Raven Posted May 17, 2014 Author Share Posted May 17, 2014 I'm thinking this could be a slide lock issue? Maybe the KKM has a tighter channel for the slide lock and isn't locking up right on this guy: Link to comment Share on other sites More sharing options...
Religious Shooter Posted May 17, 2014 Share Posted May 17, 2014 Is the KKM drop in? Or was it gunsmith fit? Link to comment Share on other sites More sharing options...
OUshooter Posted May 17, 2014 Share Posted May 17, 2014 If that is the best your kkm would do then there is another issue. At 25yrds those should be much much tighter even with a glock barrel. I will try to get some pics up this weekend. Is your glock new? Link to comment Share on other sites More sharing options...
3djedi Posted May 17, 2014 Share Posted May 17, 2014 I really didn't expect to see any improvement over the stock barrel on a gen 4......... Link to comment Share on other sites More sharing options...
Cy Soto Posted May 17, 2014 Share Posted May 17, 2014 I hate to sound critical but both of those groups are too large. You may want to consider reshooting those groups with some other ammo. Link to comment Share on other sites More sharing options...
Dkrad1935 Posted May 17, 2014 Share Posted May 17, 2014 Agree in the too large point. If my 34 shot like that I wouldn't be happy. But I still miss a lot of targets in competitions. So my barrell is apparently sporadically inaccurate:) Link to comment Share on other sites More sharing options...
HOGRIDER Posted May 17, 2014 Share Posted May 17, 2014 While AA&A is a great company and produce adequate ammo for use in a stock Glock barrel, your KKM will have a match grade chamber and conventional rifling; and will more than likely benefit from different ammo as I found the same results when using my Bar Sto vs stock. If you can find some other shooters that reload for the KKM barrels, see if they'll let you try a few of their rounds. Especially those that have developed a specific round for their barrel. In my experience, once I developed the OAL for my Bar Sto using Zero 147g JHP, the Bar Sto produced much tighter groups vs the stock Glock barrel. However, this round will also shoot just fine with the stock barrel for GSSF minor PF competition. HR Link to comment Share on other sites More sharing options...
Steven420 Posted May 17, 2014 Share Posted May 17, 2014 The barrel isn't the problem here. A better barrel won't make you a better shooter. Once you learn to do your part, a KKM will be more accurate. Link to comment Share on other sites More sharing options...
dirty whiteboy Posted May 17, 2014 Share Posted May 17, 2014 Get your money back from KKM. Wasted Link to comment Share on other sites More sharing options...
sfinney Posted May 17, 2014 Share Posted May 17, 2014 +1 If both barrels are grouping like this off a rest, you have other problems in play. Ammo, or technique. Link to comment Share on other sites More sharing options...
ES13Raven Posted May 17, 2014 Author Share Posted May 17, 2014 Is the KKM drop in? Or was it gunsmith fit? Drop-in. Link to comment Share on other sites More sharing options...
ES13Raven Posted May 17, 2014 Author Share Posted May 17, 2014 If that is the best your kkm would do then there is another issue. At 25yrds those should be much much tighter even with a glock barrel. I will try to get some pics up this weekend. Is your glock new? No, I've had it for about 6 months. I was shooting a Gen4 17 before that. Link to comment Share on other sites More sharing options...
ES13Raven Posted May 17, 2014 Author Share Posted May 17, 2014 I hate to sound critical but both of those groups are too large. You may want to consider reshooting those groups with some other ammo. Good idea. I shoot the AAA for matches though, so hopefully I can find a way to make this work. Link to comment Share on other sites More sharing options...
ES13Raven Posted May 17, 2014 Author Share Posted May 17, 2014 The barrel isn't the problem here. A better barrel won't make you a better shooter. Once you learn to do your part, a KKM will be more accurate. This was from a bench rest at 25 yards, while taking slow shots. I was making sure to have smooth trigger presses without disturbing the sight picture. I'm SSP & ESP Expert, so I don't think my technique is horrible. I think this is an ammo or barrel lockup issue. Link to comment Share on other sites More sharing options...
nsginc Posted May 17, 2014 Share Posted May 17, 2014 Interesting, I would like to see someone else post up their 25 yard targets using the kkm barrel vs stock. Link to comment Share on other sites More sharing options...
Steven420 Posted May 17, 2014 Share Posted May 17, 2014 (edited) The barrel isn't the problem here. A better barrel won't make you a better shooter. Once you learn to do your part, a KKM will be more accurate. This was from a bench rest at 25 yards, while taking slow shots. I was making sure to have smooth trigger presses without disturbing the sight picture. I'm SSP & ESP Expert, so I don't think my technique is horrible. I think this is an ammo or barrel lockup issue. Well your factory barrel should be hitting 4" groups at that distance. The KKM will cut that in half. Without a Ransom rest shooting "off the bench" doesn't rule out the shooter. Edited May 17, 2014 by Steven420 Link to comment Share on other sites More sharing options...
Steven420 Posted May 17, 2014 Share Posted May 17, 2014 I'm thinking this could be a slide lock issue? Maybe the KKM has a tighter channel for the slide lock and isn't locking up right on this guy: Maybe you cleaned it and put this in backwards? It looks like your shooting with your eyes closed.. lol just messin with ya. Link to comment Share on other sites More sharing options...
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