I've had my 39-2 since the mid 70's and still consider it one of my best carry firearms. I have never had a FTF. I use commercial as well as semi wadcutter reloads.
B square
I've used a B Square clamp on mount on my long barrel 41 for about 30 years now. Have a Mark V red dot. I don't know if they are still available. If they are you just clamp it on the barrel just ahead of the slide. Just two bolts clamp it on like a vice. It has a metal bar that goes...
M41 ammo
I've use T22, remmington, wolf, over the last 40 years with my 41. But they all eventually had tons of duds. I use to buy by the case but now I only buy 2 or 3 bricks at a time. I have only use CCI standard velocity for the last 10 years of so. It has not had hardly any duds.