Actually - 500 rounds
should equate to 10 cleans - ideally!
I think we can consider the spring replacement issue as simply keeping the pup in max efficient trim - rather than risking any slight effects from spring degradation - which I suspect could if we wished, see us thru 2,000 rounds and more if push came to shove!
Tho it is a quality firearm in all respects it has required some concessions made to achieve its current form - and one of those is the spring issue - or for me - a non-issue!