Question for the more knowledgeable Model 41 people. I have a Model 41 that functions flawlessly for 9 rounds, then always the last round in 5 different magazines, will fail to fire on the 10th round. As best I can tell, the hammer is following (not staying cocked) on the last round in the magazine. An extremely thorough cleaning made no change. That's the only problem with it. All other functions work fine. Mags insert easily/drop free easily. Safety works properly with positive, although stiff, detents. I normally never use the safety anyway but for testing purposes tried cycling it a few times. Tried 5 different 10 round steel follower magazines and 5 different 12 round orange follower magazines. I'm at a loss... Any and all suggestions welcomed.
Thanks