I've cut the shoulders clean off these cases. They're once fired 300 WSM's.
So far the 10 I've cut have all been consistent at .0155-.016" neck thickness.
Seating a "new" SA 690g feels pretty good seated to the cann. Can push in by hand until the last .150 or so, then just light pressure with a seating die. No measureable bulging in the case seating them to 3.105".
Which I believe is about .105" too long for a Savage, Remington or Winchester 300 WSM magazine box.
Here's another picture. With a 500A2 with the same bullet for comparison.
Threaded Mode