Picked up 2 boxs of Sellier&Bellot ammo for my SD40 (the ammo is 180 grain S&W 40).

Almost exactly half of the ammo failed to fire due to light primer strikes.
Put the misfires back into a new magazine, this time about 60% failure to fire.

When the ammo did function, feeding and accuracy were fine.
Nothing seen on the empty brass out of the ordinary.

Anyone seen this in the SD pistol before (with S&B ammo I mean)?

Thanks,
G.

I don't have an SD, but I've run several hundred rounds of .40 S&W S&B through my Sigma with no issues. I've also used several thousand rounds of it in various calibers in my CCW classes without issue.

Have you pulled the striker assembly out of your slide to make sure it's not gummed up?

__________________
NRA Pistol,PPITH,PPOTH&TASER

Did you by chance install the Apex kit for the SD?

After installing the Apex kit in my SD it did the same thing with my reloads.

I took some Federal ammo to the range today with this same SD pistol.
It shot and fed perfectly; not a single misfire.

The S&B primers appear slightly sunken into the primer pocket; that may be all there is to this.
To test it, I'll take the S&B cases and reload them, and make note of how the new primers seat.

This pistol doesn't have the Apex spring kit in it, but a gunsmith did work on the trigger for me to lighten the pull, and smooth it out.
He test fired it (as he always does) and there were no FTF's then.

I am pretty certain at this point that it's an ammo issue, and not a striker issue.

G.