You are absolutely correct. I also have experience with the .35 Whelen and the decrease in the amount of shoulder for headspacing after expanding the neck to .35. .257 Roberts Ackley Improved as well. There can be a a lot of reamer variations, particularly in wildcats.

Fortunately, for the topic of this discussion, Levers are not too quickly wildcatted.
One I have not fired is the Savage. I shall have to root one out and fling a few rounds downrange. I always thought they are so elegant.