ST I have not had my 35 for very long but did lots of looking before getting the caliber. Like many others have stated I think your over wondering an issue that does not seem to exist.
I do the same as Elkman other than I do measure my loaded rounds base of shell to the ogive so I know what the bullet seating depth is for an accurate load and can repeat it. Like others have noted the ogive is not in the exact same location even with in a single box of bullets.
When I loaded for a friend's 7mm with 160 accubond I set the col at max mag box with reliable feeding. Ran RL22 and i would have had to try to make an inaccurate load with that combo. Never seen a rifle that had that many accuracy nodes while working up to max charge.
Like Mike I only use once or twice fired brass for hunting. I personally toss my brass at 5 firings regardless of primer pocket tightness. No real reason behind my 5 firing logic other than I feel I got enough use from the brass at that point.
Scotty that newton of yours really has my attention via accuracy and speed. I have got to stay off this site or I'm going to end up with some form of a 35 newton AI ultra mag. :lol: