Is this normal in once fired casings from a full size m&p 40 pistol? There are small dentures in the casings and cannot pinpoint where it is rubbing/bumping. I am also shooting way low and can't figure out what the problem is. Might be my trigger but any other issues you guys might have encountered?? Please help!

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Those casings don't look unusual to me. The bumps and creases are probably from the brass impacting the slide as they are rotated and ejected back.

If you are shooting low, try shooting from a rest and see if that cures the problem. Have an experienced shooter shoot the gun and see if they have the same problem. If you are shooting low, particularly low to the left (assuming you are right handed), you are most likely anticipating the recoil, i.e., flinching.

Mine look worse than that sometimes. Other than that, my FS 40 is great.

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MSP - Retired

Looks like the ones out of my 40 CORE.

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USN Retired/VN VET
M&P X5

Ok my other question is, do you think those casings are safe to reload??

Yes, they appear to be perfectly fine for reloading. Whatever creases are not removed by resizing will be straightened upon firing.

I'll bet you'll also see a bunch of tiny brass specs in the slide before you clean it. IMO, S&W's feed system in the M&P series needs more refinement. If you hand cycle live rounds, you will see the dents and scratches after you cycle the rounds. I don't like it either, and that's why I won't buy another M&P. My other brand semi's don't leave the brass specs or damage the shell casings.

Although I prefer my brass pristine when I reload, I suspect S&W was more concerned about foolproof operation when they designed the M&P so the military and police could bet their life on their weapon.

Since I don't fit either category, I'll put up with the inconvenience of scratches and dents.

If that were the case, they would have not left the firing pin energy numbers so close the minimum needed to ignite a primer that failures to fire are reported with alarming regularity. It should go bang every time with any ammo encountered anywhere in the world if it is to be taken seriously as a military pistol option. Not just soft primer American made ammo.

You would think they would have learned their lesson when the 459M was unceremoniously ejected from the M9 trials for failing, right out of the box, to have enough firing pin energy. Personally, I prefer a slightly heavier trigger pull if that is what is necessary to have absolute reliability in firing. Sometimes ammo is bad, but barring bad ammo, it should fire every single time. Period.

Unfortunately, we seem to see frequent reports of failures to fire with the revolvers also. I never noticed the issue until they went to the frame mounted firing pin.

You should see what a G3 does to brass besides eject them into the next zip code