I can't comment on life but being a belted cartridge I would look at resizing and make sure that the shoulder is not being set back too much. If you are trimming after each resizing that is a good indication your are over sizing the brass.View attachment 568245 How many times should I be able to reload same brass.
I have H brass 300WM with case failure after 5-6 reloads.
No speed demon here, running at 2934 w/180TGK…tumble, anneal,
fl resize w/measured neck and trim every case every time.
Curious if this is normal brass life
That's the best news I've heard today!lapua makes brass for a 300 win now