Hi I deep clean after 100 rounds, the reason for this is that I reload and make a batch of 100 rounds so a few fouling rounds then try the new batch. To be honest I haven't shot so many rounds before cleaning that I see a change in accuracy.
I will inspect every screw , grease the bolt lightly clean and grease the thread for the mod ,
Have a look at the gun sling + the swivels,I've had 2 instances where the swivels have broken.😱
This is My method for cleaning, everyone has their own, you need to have confidence in your equipment for you to shoot at your best.,+ safely.