I like/load 250gr Partitions over 59gr R-15
Are you sure that's your load? As for me personally, I like 250's--why else would you buy a Whelen??
Nice elk. And I feel the same way about the 250s, and so did the Colonel himself. 250s are the only way to fly with a Whelenator.
And yes, I 'm quire certain of the load......
Primers look just fine.......
Regardless of what your manuals say, 58gr of R-15 is a very common loading in the 35 Colonel with 250s. Mine just likes 59gr a tad better