I took my NIB 9mm P2000 LEM to the range today. I field stripped it and cleaned it yesterday. Afterwards I applied a good coat of slide glide to the slide, frame, barrel and checked out the recoil spring and mags to make sure they were acceptable. After reassembly I noticed it was not as smoothly operating. So I disassembled to verify everything was in order and it checked out OK. At the range I loaded up my first mag and bang then FTE. I pulled out the half way ejected case and finished off the rest of the 50 with no issues. This has been what I use on my Sig P220R and have had no issues. I'm thinking it may be the slide glide and I should use only oil. Has any one else had any issues with slide glide or grease? If so, what are you using that works?