I picked-up an older (serial #469xx) model 41 with the 5 1/2" barrel. It shoots all six types of ammo that I have tried in it without any problems. I have a 7" barrel from my "A" series model 41 two barrel set. The 7" barrel will not function properly with any of my six standard velocity loads or any of the four high speed loads that I have tried.
The slide does not close completely on at least one round per magazine.
The 7" barrel works fine with the "A" series gun.
Any thoughts or suggestions from you M41 experts?
Mark