I suspect that the Whelen really doesn’t need premium bullets. I’ve used 250 grain Interlocks and 250 grain Hot Cores in my 350RM for years. Granted if I were to be shooting something like a big Brown or something dangerous in Africa I’d pay the extra cents for premium.

I prefer classic.
Semper Fi
I used to run with the hare. Now I'm envious of the tortoise and I do my own stunts but rarely intentionally