Re: S&W 41: What it likes to eat
You do need to run premium ammo in your 41. I don't know how to explain this other than to describe "promotional" ammo.
CCI Blazer, Winchester Wildcat, Remington Thunderbolt, etc., etc., are examples of promotional ammo. The issues with this type of ammo are among other things, the thinness of the casing. Rounds get kind of a rough ride in a semi auto, and coupled with the match tolerances of your 41, just don't feed reliably. It seems a shame you have to pay a premium for the part of the cartridge that gets swept up, but in a 41, you do.
Once you find a premium cartridge you 41 likes, expect to be amazed. By premium, I don't mean the .22's that sell for 25 cents a shot, but good quality ammo. Don't get frustrated here, just remember the fun is finding out.