New striker = A good day at the range
I received my new striker two days ago, installed it, and took my 40c Storm Lake .357 SIG conversion to the range yesterday for a good workout. I shot 50 rounds each of Lawman, American Eagle, and SIG Sauer .357 SIG ammo. I then switched barrels, and shot 50 rounds of Winchester Ranger .40 cal. ammo. All 200 rounds fired perfectly. It was the first time I'd gotten through an entire box of SIG Sauer ammo without a failure to fire. Apparently the source of my FTF problem was the striker. And that wasn't the only good news. I had by far my most accurate session ever with my 40c .357. A good day all around!
So, if you make the Storm Lake conversion, and your striker has some miles on it, (mine had 4,000 rounds), it's a good idea to get a new one. And because there is some additional friction as the new barrel wears in, it's also a good idea to get a new recoil spring assembly and use additional lube to overcome that friction to avoid the out-of-battery events I experienced.
Finally, at the risk of drifting my own thread, I'll comment on the package my striker came in. There have been a lot of posts on the Forum, as well as on the SIG Talk forum about the failures of the SIG P365's MIM strikers. Well, SIG may have problems with their MIM strikers, but S&W is proud of theirs! Look at the attached photo, and you can see that S&W is more than willing to announce that their M&P strikers are MIM parts.
That's all for now. If I have any new adventures to report with my Storm Lake conversion, I'll update this thread.