By "misfire" do you mean it fails to ignite the cartridge, or fails to extract it after firing?
The Model 41 is quite famous for failing to reliably cycle most brands of standard velocity ammunition. CCI standard is recommended, even by Smith & Wesson. I've been able to use Eley and all other brands by putting a drop of oil on the top round in the magazine each time (try it, it works), but CCI is the most reliable without that kind of trickery.
Unfortunately, as you have discovered, most reliable doesn't necessarily mean most accurate.
If the problem is in fact that the cartridge doesn't fire, is there evidence of a good firing pin strike afterwards? I suspect that the gun is just barely cycling with the other brands (Eley should be extremely reliable for ignition) and is stopping just short of completely closing the chamber when stripping some rounds out of the magazine. As a result, the cartridge seats into the chamber with the hammer strike rather than igniting. Does the firing pin impression on the cartridge that didn't fire look faint? Does the cartridge fire with a second strike?