The RCBS type pullers do a good job and every reloader should have one on his bench. Stick happens. If a case is really stuck no penetrating oil can get into it, no freezer tricks will free it.
When drilling and tapping the primer pocket be sure to unscrew-back out the decapping stem as far as possbile to prevent damaging it. If you "do it yourself" try a 1/4 x 20 tap and bolt, the finer/shallower threads of 1/4 x 28 sometimes strip out of the soft brass.
Sticking usually occurs when we don't lube the lower, thicker portion of the case near the head. That's where they get stuck, not on the upper portion or neck. The only warning we have is when the lever pressure becomes greater than normal.