I agree that is the method to gain accuracy over the life of your brass without having to trim the brass. That approach appears to work well for you.

I haven't trimmed my current set of 6.5mm Creedmoor or .223 brass in 20 and 19 reloads respectively and have adjusted the seating depth with each cycle to adjust for changes in trim length.
I haven't seen any loss of accuracy using that technique during that time. Actually with a change to a new Oryx chassis, I have gotten an improvement in accuracy because the chassis is stiffer than the factory plastic stock.