A good skill to acquire is the ability to contrast the ejection pattern over time and replace the recoil spring when needed, and not based on some arbitrary round count.
The extractor can weaken also. Generally with much more than 2-3k though the gun. Especially spring loaded extractors like on a few models.
But yea, knowing your gun and loads makes life better if you shoot a lot.
4ft to 8ft is my personnel ejection restrictions. Sometimes the Delta Elite will go past that with some loads. Even with all the trick parts. But that is the nature of the combination.
