I would like to thank everybody for the suggestions. I think it probably is a good idea to replace the spring assy. I have tried manually letting the slide go and it has not made a difference. In regards the the UMC, only ammo I have really tried. Again, no problems with it for the first 750-800 rounds with UMC so thought it should continue working fine.
When cleaning, I feel I am pretty thorough, however have a question about actually greasing the slide. I have been, and am wondering if this might be actually slowing the action enough to cause the problem. What is the protocal here. I clean the rest of the gun thoroughly with shooters choice, Kroil, etc. (higher-end products only).
Also, if the round wont fully chamber when releasing the slide, should I force the slide closed or simply pull back, eject the cartridge and start again.
I have bought some winchester white box as well, and thought I would try it.
I am relatively new to the handgun arena and appreciate the input