thoughts on this FTF

P

pgb205

New member
Got a few ftf's from my SD40.

The slide hits the top round and even creates a visible nick on the primer but the round does even budge from the mag onto the ramp.

As far as I remember all the rounds are tullamo, but before anyone says 'bad ammo' previously I've never had similar issue with this gun+this ammo.
 

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Is the front of the bullet nosediving and hitting the magazine? The 2nd pic shows there's a gap between the case and feed lips. Looks like the bullet is getting pushed downward and lodging against the mag.
 
hmm, not sure.

These are oem, brand new mags. both look identical as can be seen in pictures.
i've loaded them and took pictures. doesn't seem like bullets are leaning downward.
 

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Those images of the primer getting dinged are scary! I don't know of a pistol design that pushes on or even touches the primer to feed the round. Can you post an image of the slide under the firing pin area without a magazine inserted? It would be similar to image 2 without the round in place.

Are the primers in that batch sitting properly below the level of the case head?
 
@Malh As far as I can tell the primers are properly seated. I've attached more pictures.
 

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That last one is the one I was looking for. It looks normal except for what appears to be a blemish on the pushing area. Is that a raised area? It looks like it matches the dings on the primers.

Even so, I don't see how it would be causing the problem of a round failing to feed. Have you tried slowly releasing the slide to see what the round is doing as it slides forward, or rather doesn't slide forward like it's supposed to?
 
Pardon me for my ignorance. Did those OEM factory magazines come with the firearm? If they aren't factory magazines, get one and get back to us. Sometime aftermarket stuff is junk. I learned this the hard way in the '80s.

Here's why I ask. Those bullets don't seem to rise up high enough and instead plow into the magazine and bind up the gun. It could be the magazine lips need work or the follower is no good. You have to compare it to a factory magazine.

Now if they are factory, try some round nose bullets and see what happens. Some guns don't like flat nose bullets or hollow points without some work.
 
Gary said:
Some guns don't like flat nose bullets or hollow points without some work.
Click to expand...
I started to mention that at the top, but noticed that the caliber is .40 S&W which loves the TC bullets. I don't think that's the problem. The magazines definitely could be.
 
The slide won't be hitting the primer with the cartridge still in the mag. I think, a very big WHAG it is too, you may have the cartridges moving backwards in the mag under recoil and the wee nick is from it hitting the mag.
It happen with any ammo or just the Tula?
Those bullets look like they're a bit 'out' of the case. What's the OAL?
"...which loves the TC bullets..." So does .45 ACP. Friggin' things feed like hot dam in my Colt.
 
Looks like a nose-dive issue to me.

These are oem, brand new mags. both look identical as can be seen in pictures.
i've loaded them and took pictures. doesn't seem like bullets are leaning downward.
Click to expand...
As the pistol cycles and runs through the magazine, the orientation can change, as will the amount of force being applied to the top round (because the spring has to lift fewer cartridges as they're fired). Also keep in mind that the 'loaded and ready' state of the pistol has the slide pushing down on the cartridge stack in the magazine, and keeps the top round in a different orientation than when held in your hand (or with the slide open).

In my opinion, nose-dives are almost always caused by:
(In no particular order.)
- Bent / bad / dirty magazines.
- Improperly sized ammo.
- Weak magazine springs.
- Bad engineering. --Manufacturers biting off more than they can chew and stacking too many cartridges for marketing sake, even though the case and magazine geometry really don't allow such capacity to be viable. (**Cough** Remington RP-9 **cough**)
 
check your fully loaded mag for a gap between the top round and the one under it. the gap would be at the front of the round, not the rear.

then apply some downward pressure to the nose of the top round and see how easily it nosedives.

try this fully loaded and then with less rounds in the magazine.

what i'm thinking of is how freely the top round can nosedive. nosedive is a problem with all single stack magazines, describe at the link below, and some double stack magazines depending on how they are designed.

https://americanhandgunner.com/nosedive-and-feed-angle-in-the-1911-45-acp/
 
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