wdfwguy Posted July 12, 2018 Share Posted July 12, 2018 I loaded some new ammo this week, and the first round out of a mag doesn't always completely chamber. Maybe 1 out of 5, and always the first round. The first round sticks about halfway in the chamber, and no issues after that. I feel like it must be an ammo issue, because that's the only thing that's different. I did the drop and spin test when I was setting the OAL. Maybe I need slightly more crimp? Or does it sound like something else altogether, maybe a gun issue? Oh, its a CZ Shadow with a conical style bullet. Link to comment Share on other sites More sharing options...
perttime Posted July 12, 2018 Share Posted July 12, 2018 Did you try more than one magazine? Link to comment Share on other sites More sharing options...
techj Posted July 12, 2018 Share Posted July 12, 2018 OAL consistency? Are you riding the slide when loading the 1st round thereby slowing it too much? Link to comment Share on other sites More sharing options...
wdfwguy Posted July 12, 2018 Author Share Posted July 12, 2018 46 minutes ago, perttime said: Did you try more than one magazine? I *think* so, but I'll try a few different mags today Link to comment Share on other sites More sharing options...
rishii Posted July 12, 2018 Share Posted July 12, 2018 How are you chambering the 1st round, are you sling shoting it using the slide stop to drop the slide or hand cycling it the reason I ask is the rest of the rounds feed ok, so it’s ether a ammo problem, mag problem, gun problem or operator error the trick is to remove each variable until you narrow it down Link to comment Share on other sites More sharing options...
wdfwguy Posted July 13, 2018 Author Share Posted July 13, 2018 I only remember the first round not feeding, but I'm sure I hand cycled some and loaded some from slide lock This afternoon, II tried three different CZs and several different mags, just hand cycling, and had the same issue every fifth or sixth round or so. But if it's an issue while hand cycling, but not after the first round while being fired, it's not really an issue? My understanding is that it's not uncommon with CZs using non-RN bullets. Although, the first round from a mag should feed from slide lock. And if it's not, and the problem is with several different guns and ammunition, it's almost certainly an ammo issue. Link to comment Share on other sites More sharing options...
George16 Posted July 13, 2018 Share Posted July 13, 2018 What’s your current OAL? I’m using truncated cone flat point bullets for my shadow 2, TSO and czechmate and had to load them short at around 1.102” oal. Remember, CZ’s were designed for the ball ammo which are the only available ammo in Eastern Europe where the guns are manufactured. So anything but ball ammo had to be loaded short unless your barrel had been reamed. Link to comment Share on other sites More sharing options...
Hi-Power Jack Posted July 13, 2018 Share Posted July 13, 2018 11 hours ago, wdfwguy said: if it's an issue while hand cycling, but not after the first round while being fired, it's not really an issue? IMHO, it is an issue. One that could come to bite you in your nether parts at the wrong time. I'd chamber check all my ammo before I load it into a mag, and bump into my practice bin any rounds that don't PLUNK. Could be "crimp", or OAL - or brass bulge. Whatever it is, I'd eliminate it. Does this happen with factory ammo ? Link to comment Share on other sites More sharing options...
wdfwguy Posted July 13, 2018 Author Share Posted July 13, 2018 I haven't tried any factory ammo... But I loaded a handful of round nose bullets and they hand cycled perfectly. So it's unlikely to be crimp. I was loading the original rounds @ 1.095, then I worked my way down to 1.08 and a few were still hanging up. I think I'll just leave these bullets for my Glock... Link to comment Share on other sites More sharing options...
wdfwguy Posted July 13, 2018 Author Share Posted July 13, 2018 FWIW this is what the malfunction looks like Link to comment Share on other sites More sharing options...
George16 Posted July 13, 2018 Share Posted July 13, 2018 (edited) What’s your crimp? Can you post a pic of the round? You shouldn’t have any problems with that OAL. Might be brass bulge or crimp that’s keeping it from feeding it all the way in. Edited July 13, 2018 by George16 Link to comment Share on other sites More sharing options...
Hi-Power Jack Posted July 13, 2018 Share Posted July 13, 2018 Could also be the mag springs … Link to comment Share on other sites More sharing options...
wdfwguy Posted July 13, 2018 Author Share Posted July 13, 2018 Is it possible that it was a recoil spring issue? I field stripped it this morning and realized it had the factory spring in it, so I swapped it for a 12# CGW. I'll take a picture, but I took ~200 rounds to the range this morning and they were 100%. Link to comment Share on other sites More sharing options...
wdfwguy Posted July 13, 2018 Author Share Posted July 13, 2018 Link to comment Share on other sites More sharing options...
Hi-Power Jack Posted July 13, 2018 Share Posted July 13, 2018 4 hours ago, wdfwguy said: I took ~200 rounds to the range this morning and they were 100%. Sounds like Problem Solved Link to comment Share on other sites More sharing options...
g mac Posted July 14, 2018 Share Posted July 14, 2018 Use RN profile bullets, semi-auto likes round nose bullets from my experiences...and check your bullet over all length. could be your magazine too. Link to comment Share on other sites More sharing options...
HesedTech Posted July 14, 2018 Share Posted July 14, 2018 (edited) 8 hours ago, wdfwguy said: Is it possible that it was a recoil spring issue? I field stripped it this morning and realized it had the factory spring in it, so I swapped it for a 12# CGW. I'll take a picture, but I took ~200 rounds to the range this morning and they were 100%. Check the the CZ threads, 12# recoil spring for 9mm seems a bit high. I think it’s covering another problem. Do your rounds plunk and spin check? My son runs two CZs, a S2 and SP01, both with truncated cone bullets required an OAL of 1.08. Running Precision Delta FMJ RN at 1.14 perfectly. He runs 10# recoil springs and that’s really more than needed for reliability. Edited July 14, 2018 by HesedTech Link to comment Share on other sites More sharing options...
George16 Posted July 14, 2018 Share Posted July 14, 2018 I don’t think think your recoil spring has anything to do with the malfunctions you experienced. When you field stripped it, did you clean or oil the barrel/slide before putting it back together? Sometimes, too much dirt or carbon buildup can prevent the slide from sliding back into battery when stripping a round from the magazine. Can you measure your crimp? Should be around ~.376 - .377 to prevent setback also if they are too loose. Link to comment Share on other sites More sharing options...
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