I also have about 2,000 or a little more rounds through my GSG 1911-22. I replaced my guide rod and spring and installed the Performance Ehancement Kit from
www.cwaccessories.com and my groups shrunk back to better that new. The guide rod is stainless steel and longer than the stock one. Problem solved; and fast shipping from CWA. This whole upgrade was around $80 and well worth it in my opinion. My GSG runs great now and eats anything; accurately too.