Call or email Smith & Wesson. They'll send you a pre paid return shipping label. They will fix you up at no cost to you other than some aggrevation.

https://www.smith-wesson.com/brands/sw

I have three 4 1/4" guns. One has over 5,000 rnds down the pipe another almost 3,000 and third was function checked, sighted in and put in the safe as a backup. I now have almost 500 rnds thru the 2 3/4" gun that's the subject of this post. I have never had a misfire with these guns. 99 percent have been handloads using CCI, Win and Federal primers. Not that this helps you, just sayin'.

S&W has had some "short" firing pin problems in the recent past. People reporting the problem on the S&W forum have been taken care of by S&W under warranty.

I know it sucks. You gun should work 100 percent with any ammo and S&W CS will make it right.

Paul