Craig N Posted February 10, 2014 Share Posted February 10, 2014 Just how far can you go with reaming a KKM barrel in 40 S&W? I know STI guns run out to 1.180 and I was thinking about taking mine out to 1.140ish to see if it fixes some of the problems I have. Rounds fit fine in the stock barrel but don't fully chamber in the KKM. Link to comment Share on other sites More sharing options...
sdrr72 Posted February 10, 2014 Share Posted February 10, 2014 The mag is the limit in a Glock, not the barrel. You should be able to run 1.140 in both a stock Glock mag and a KKM barrel (I have both). I run 1.135 with no issues. The KKM issue you are probably having is with 0.401 or 0.402 lead rounds. KKM will ream out your barrel for free if you send them the barrel and some dummy rounds. My lead and Bayou Bullets run fine now after they did that for me. Link to comment Share on other sites More sharing options...
darkvibe Posted February 10, 2014 Share Posted February 10, 2014 The mag is the limit in a Glock, not the barrel. You should be able to run 1.140 in both a stock Glock mag and a KKM barrel (I have both). I run 1.135 with no issues. Same here. I have experimented and can run out to about 1.145-1.150 before feeding issues start in both my kkm and stock barrels. I load at 1.135 to be absolutely reliable. I am running .400 poly coated lead bullets. Are your rounds hitting the lands? I suspect if your ammo is short enough to feed reliably it's more likely a brass issue. If you are trying to get a 1.180 long round in there i would give it up. You aren't going to be running 1.180 like an STI by reaming the barrel out because it won't feed. Link to comment Share on other sites More sharing options...
fyresq Posted February 10, 2014 Share Posted February 10, 2014 The mag is the limit in a Glock, not the barrel. You should be able to run 1.140 in both a stock Glock mag and a KKM barrel (I have both). I run 1.135 with no issues. The KKM issue you are probably having is with 0.401 or 0.402 lead rounds. KKM will ream out your barrel for free if you send them the barrel and some dummy rounds. My lead and Bayou Bullets run fine now after they did that for me. +1. I had the same problems with a Lone Wolf barrel and after having it reamed and throated it runs great. Aftermarket barrel manufacturers have to know that people are swapping barrels to shoot lead, I don't know why they don't cut the cambers for it from the start, or at least offer it as a option. It would save a lot of time an aggravation. Link to comment Share on other sites More sharing options...
Craig N Posted February 10, 2014 Author Share Posted February 10, 2014 No I'm running at 1.120 give or take. The rounds that wont gauge in the KKM drop right in the Glock barrel. Link to comment Share on other sites More sharing options...
kamikaze1a Posted February 12, 2014 Share Posted February 12, 2014 I load TC lead cast to 1.165 with LW barrel in a G35. Used a Manson reamer and reamed until no bullet contact with throat. All is good after reaming. Link to comment Share on other sites More sharing options...
darkvibe Posted February 12, 2014 Share Posted February 12, 2014 No I'm running at 1.120 give or take. The rounds that wont gauge in the KKM drop right in the Glock barrel What bullet are you using? Link to comment Share on other sites More sharing options...
Craig N Posted February 12, 2014 Author Share Posted February 12, 2014 Falcon Bullets 180gr TCFP Link to comment Share on other sites More sharing options...
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