Thread: Groups settling after cleaning

What you are experiencing is a common phenomenon and the simple solution is to not clean it so often, and when you do then just a quick pass with a dry brush is enough. My .223 Tikka CTR is similar and shoots around 0.6 - 0.75" for the first 10 rounds from a clean bore then settles to 0.4 - 0.5". It is a hunting rifle and either result is more than good enough. Just give your rifle the full de-luxe clean once a year (unless you arse-up in a creek).