I think I've figured this out. I get the same thing only it isn't necessarily associated with a jam - it just dents the bullet nose. And yes it can/does seat the bullet deeper in the case.
So I was testing this issue (because I had it previously too) out with my 7rnd mags. I think I figured out why this is happening. I'm guessing this is pretty much happening to all magazines, but not sure why only some folks are experiencing the FTF and others not.So this has been going on for a few months now. I have 7 round mags and when I load 7 rounds in, after the first shot the next round nose dives and gets stuck on the feedramp. It has only happened with round nose ammo. I haven't tried flat nosed (the flat nosed stuff I have is a higher grain that I don't enjoy shooting through the micro 9.
Has anyone had this issue? I ask because I happened to catch a YouTube video of another person mentioned that it was happening to them as well.
I believe that if I load 6 rounds in, it's fine.
Yes I have noticed this as well. I guess if there was an anti tilt follower like in some of the rifle mags we probably wouldn't have this issue.So I was testing this issue (because I had it previously too) out with my 7rnd mags. I think I figured out why this is happening. I'm guessing this is pretty much happening to all magazines, but not sure why only some folks are experiencing the FTF and others not.
The issue is in the magazine follower, not the feed ramp or anything to do with the gun itself. If you load 2 rounds in your magazine, the follower sits exactly how it's supposed to. As you load more rounds in, the follower's nose begins to dip down a little bit due to spring pressure (I presume). By the 7th round in the magazine, the first 6 are now laying more horizontal, while the 7th round is still sitting in the magazine correctly. If you look between the 6th and 7th round in the magazine (the top two rounds), there's an air gap between the noses of the rounds. You can actually push down on the top round, it it'll move 1/4". If you unload 4 or 5 rounds, so there's only 2 or 3, this gap goes away and all rounds are sitting as they're supposed to.
Basically when the magazine is full, and the slide comes back to feed the next round, and because there's a gap between the top two rounds, the top one is able to nose down a little more than normal and it sometimes gets stuck on the feed ramp. A good bump on the rear of the slide will usually put it into full battery.
Here's some pictures to help what I'm talking about, there's descriptions preceding each picture.
PICTURE 1: Magazine with only 2 rounds loaded - notice the 2nd one poking it's nose out.
PICTURE 2: Magazine with 7 rounds loaded - notice you cannot even see the nose of the 2nd round down from the top
PICTURE 3: Magazine with 7 rounds loaded - look between the top two rounds and you can see the gap due to what I presume is the follower has nosed down a little bit allowing this to happen.
PICTURE 4: Magazine with 7 rounds loaded - I am pushing down on the top round. The nose is allowed to move downward about 1/4" due to the gap present.
I never noticed this; it does taper ever so slightly. So you're saying all single stack magazines allow a fully loaded magazine to have this gap between the top two rounds?The root of the problem is the tapered 9mm cartridge case. A straight-wall case like a .40S&W would stack straight and eliminate this flaw. Presumably the tapered case design was for easier extraction back in the pioneer days of autoloading pistols.