LilTMoney Posted August 4, 2016 Share Posted August 4, 2016 I am running an sti matchmaster and have recently ran into some issues with the slide fully closing. Does not happen alot but once is to many. I have several different springs that i run so i dont think that is issue. It seems to be the case not fully entering. Sometimes so tight that the slide has to be pryed back. I will normally eject the shell and keep running. Does anyone know what could be causing this? Link to comment Share on other sites More sharing options...
Sarge Posted August 4, 2016 Share Posted August 4, 2016 Ammo is too long. NEXT! Link to comment Share on other sites More sharing options...
bret Posted August 4, 2016 Share Posted August 4, 2016 Check your crimp too, that can cause you the same problems you are having. Link to comment Share on other sites More sharing options...
LilTMoney Posted August 4, 2016 Author Share Posted August 4, 2016 I will double check the ones that wouldnt chamber. I usually run 1.135 or 1.170 for 9mm. Thanks for the reply Link to comment Share on other sites More sharing options...
LilTMoney Posted August 4, 2016 Author Share Posted August 4, 2016 Thanks bret. I shot 200 rounds yesterday and probably had 5 that got totally jammed and would go any further. I had about 10 that i had to push on the back of the slide just a little to get fully in. The other 185 ran good. Link to comment Share on other sites More sharing options...
bret Posted August 4, 2016 Share Posted August 4, 2016 Measure the crimp, about .378 to .379 is good. Link to comment Share on other sites More sharing options...
LilTMoney Posted August 4, 2016 Author Share Posted August 4, 2016 Will do, thanks! Link to comment Share on other sites More sharing options...
Hi-Power Jack Posted August 4, 2016 Share Posted August 4, 2016 I usually 1.135 or 1.170 for 9mm. That's a very large spread ... Possibly the 1.135's are running well, and the 1.170's are jamming in your chamber. Or, the crimp ... Link to comment Share on other sites More sharing options...
Nugget Posted August 4, 2016 Share Posted August 4, 2016 Agree with it being an ammo problem. Pull out your barrel and chamber check all your rounds then measure differences between pass and fail rounds. Length, crimp. Link to comment Share on other sites More sharing options...
LilTMoney Posted August 4, 2016 Author Share Posted August 4, 2016 Hi- power, The reason for the variance is i was having some feeding issues so it was recommended to go with 1.170 to get the bullet a little closer to the feed ramp.i would normally run a 1.135. So i started running that with not many issues. Plus tuned and checked mags. I kept all the ones seperate that i had issues with. I will check length and crimp. Link to comment Share on other sites More sharing options...
LilTMoney Posted August 4, 2016 Author Share Posted August 4, 2016 Thanks nugget will try that as well Link to comment Share on other sites More sharing options...
olstyn Posted August 4, 2016 Share Posted August 4, 2016 This may be a stupid question, but are these rounds all passing case gauge/chamber check, or are they just being loaded and run without that quality control step? Link to comment Share on other sites More sharing options...
LilTMoney Posted August 4, 2016 Author Share Posted August 4, 2016 Sarge 1.135 is to long??? Just curious what you are running? Link to comment Share on other sites More sharing options...
LilTMoney Posted August 4, 2016 Author Share Posted August 4, 2016 Olstyn, not a stupid question at all. Honestly no they are not all checked all the time. I usually try and spot check as i go. I load and shoot between 500 and 1000 rounds per week. Just recently started having this problem with this particular gun. Link to comment Share on other sites More sharing options...
LilTMoney Posted August 4, 2016 Author Share Posted August 4, 2016 I will pay closer attention to that to make sure it is good. Link to comment Share on other sites More sharing options...
Hi-Power Jack Posted August 4, 2016 Share Posted August 4, 2016 Just started having this problem with this gun. Does that mean you are using the same ammo (both the 1.135" and the 1.170") in another gun, and they work fine? Link to comment Share on other sites More sharing options...
IDescribe Posted August 4, 2016 Share Posted August 4, 2016 LilTMoney, listen to Sarge.You can't just load ammo to whatever length and assume it will work. YOU need to verify the max OAL for your pistol with EVERY make and model of bullet you use before loading. TO do so:Remove your barrel from the pistol. Load a dummy round (no primer, no powder) to the maximum OAL for your magazine.Does the bullet slide all the way in and spin freely with no drag?If YES, that's your max OAL.If NO, start seating a little deeper, a little deeper, checking the cartridge in the chamber each time to see if it spins freely.When YES, that's your max OAL, and you should load maybe .010 - .015 shorter than that to account for inherent variation in your loading process.Make sure it spins freely. There will be a stretch as you shorten where it will start to spin, but it drags a little. You're looking for it to spin freely.Run the test with every new bullet. Not only will different profiles load differently, but the same profiles from different manufacturers will load differently. Link to comment Share on other sites More sharing options...
LilTMoney Posted August 4, 2016 Author Share Posted August 4, 2016 Hi-power. The 1.135 and 1.170 both run in the sti. Also the problem is not all the time. Its just hit and miss. I have never had this problem in any gun but this sti 2011. The only reason i had tried 1.170 is that a custom gun guy recommended it because of some feed issues. I usually run 1.135 and they run great in glocks, m&p, and kimbers that I have. Link to comment Share on other sites More sharing options...
LilTMoney Posted August 4, 2016 Author Share Posted August 4, 2016 IDescibe, Thanks for that! Its not that i discarded what sarge was saying, 1.135 is factory for alot of rounds so i was trying to figure out why he automatically thought that was to long. I totally understand what you are saying and that is exactly what i am trying to accomplish. Something that runs well, no hiccups. Link to comment Share on other sites More sharing options...
Garmil Posted August 4, 2016 Share Posted August 4, 2016 (edited) IDescibe, Thanks for that! Its not that i discarded what sarge was saying, 1.135 is factory for alot of rounds so i was trying to figure out why he automatically thought that was to long. I totally understand what you are saying and that is exactly what i am trying to accomplish. Something that runs well, no hiccups. He thought it was too long before you ever listed lengths. And just because 1.135 is a standard length doesn't mean that 1.135 can't be too long in some scenarios. Edited August 4, 2016 by Garmil Link to comment Share on other sites More sharing options...
LilTMoney Posted August 4, 2016 Author Share Posted August 4, 2016 Thanks Garmil. I see what you are saying. Link to comment Share on other sites More sharing options...
GrumpyOne Posted August 4, 2016 Share Posted August 4, 2016 What brass? I had some 38 super brass that wouldn't run...crimp was perfect, OAL was perfect, try to load in the gun and you had a death jam...turns out the the extraction groove on that brand of brass, and only that brass, was .004 not as deep as all others. The extractor was keeping the case from sliding fully up onto the breach face. Link to comment Share on other sites More sharing options...
Sarge Posted August 4, 2016 Share Posted August 4, 2016 IDescibe, Thanks for that! Its not that i discarded what sarge was saying, 1.135 is factory for alot of rounds so i was trying to figure out why he automatically thought that was to long. I totally understand what you are saying and that is exactly what i am trying to accomplish. Something that runs well, no hiccups. Easiest way to figure it out us to drop check the ammo you are currently having problems with. Remove barrel and drop a round in. It should bottom out with a nice plop sound. It should spin with NO resistence. Then it should fall out with just gravity to help. I agree that crump might have gotten out of adjustment but it seems 99% of the time length is the issue. Crimp should indeed be in the mid to upper .37's. All guns are different and 1.135 may indeed be too long for some guns depending on bullet. Some round nose bullets I have used had to be loaded down to under 1.10 when most ran at 1.15 easily. If ammo passes all tests the we can tackle the gun. Link to comment Share on other sites More sharing options...
LilTMoney Posted August 4, 2016 Author Share Posted August 4, 2016 Thanks so much sarge. I am in the process of drop testing ammo as we speak. This is my first STI and first race gun. I have been reloading and shooting for a long time and i am finding out this is alot different then just the normal production guns. I will be drop testing all ammo and checking crimp specs as well. Once again thanks alot for your time and input, i am learning alot. Link to comment Share on other sites More sharing options...
Sarge Posted August 4, 2016 Share Posted August 4, 2016 Thanks so much sarge. I am in the process of drop testing ammo as we speak. This is my first STI and first race gun. I have been reloading and shooting for a long time and i am finding out this is alot different then just the normal production guns. I will be drop testing all ammo and checking crimp specs as well. Once again thanks alot for your time and input, i am learning alot. Indeed! I'm a 2011 Open shooter now and I say all the time how much I miss my Glock 34 I started with! Lol. Stick with it. You'll figure it out. Link to comment Share on other sites More sharing options...
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