Nice pic,I've always wanted to try the 35 Whelen.
What rifle are you shooting it out of?
Wasn't it Remington that introduced the first commercial loading in conjunction with that years offering of the 700 classic?
Not sure of the year,but it was in the 80s.

SYKCO JYD#112
It's better to have it & not need it, than to need it & not have it.