Change ammo. Smith 41's are notorious for being extremely picky about what ammo they'll both shoot well and cycle the action. No two are alike. One will be happy with one brand of ammo while another won't be. Until you find the brand it likes, it can make you crazy.
You have to try as many brands of ammo as you can the find the ammo that your pistol likes. The price of the ammo doesn't matter either.
Mine will only shoot and cycle Remington Target and IVI Standard Velocity for bullseye shooting. It works just fine with high velocity ammo though. The pickiness of a 41 is about target velocity ammo. Anybody who tells you that high velocity ammo will damage a 41 is confused. Lots of our Southern cousins hunt tree rats and such with a 41.