With the slide off, can you push down on the triggerbar and does it spring back upward? Without fully dropping the hammer (with the slide off), how does the DA action feel (option to stick a rag in the hammer notch to catch it)? Is it still smooth and completes the cycle?
With the barrel and slide stop removed, cycle the slide in the frame and see if there is anything the causes the slide to bind. How is your slide stop? Recoil Spring? How is the fit of the barrel in the slide? How does the peanut look on the barrel? With the grips off, how does the main spring look? Is there anything that would prevent it from fully compressing? Again more pictures would help.
Cheers,
Toby