garand4life...try working the slide with empty chamber....if the slide is hard to work without anything in the chamber ... push the muzzle against a solid object, and try to pull the slide back... if it doesn't unlock, there is typically a problem with the barrel fit...too long in the hood area, too tight bushing, not enough link clearance, not enough slide stop to barrel feet clearance...
with the barrel removed from the slide, place it in the frame, and push it rearward.. the slide stop should swing freely when placed in position
check that the recoil plug is in correct contact with the barrel, and no shock buff is in place
check the disconnector ditch under slide, and check and see how much disconnector is exposed, the top should be smooth and rounded
check that the hammer strutt and plunger is free to move in the mainspring well and not impeded with any form of firearm lock...see that the firing pin stop is rounded and moves freely over the hammer
if the frame to slide (without barrel and recoil spring) jam in the rearward position, check that the rounded end of the frame clears
good luck