No, I actually have 140 once fired from my rifle that were the original factory ammo and those are the ones I'm dealing with. I also have 100 new brass with some being fired, but nothing resized yet.
As far as sizing, I followed directions and with dies. First I measured multiple cases and found what I thought was largest of the bunch (shoulder length). Then with case in up position in press, screwed die down until touching. Then lowered case and screwed die in further until seeing it get bumped back. Now seeing these recommendations, I see I probably shouldn't have done it this way until being fired 2=3 times!
The rifle is a Christensen arm ridge line and yes I know how to remove firing pin.