One of the owners of Hammer Bullets told me that he didn't think that 66 grains of CFE223 would get this bullet up to pressure. So I never shot the CFE223 load.
Does Quick Load take into account that Whelens have fairly long throats?
I was thinking more in line with a 400 grain solid #13 in the 458 Win/ Lott. Instead of the 450. A mono metal expanding & solid bother at 400 grains as an all around combo.
What is your opinion of this combo
I never quote Kinetic energy figured because they do not relate to lethality. Energy figures don't kill game, holes through vitals is what kills.
Another advantage of the 35 Whelen VS the big fat magnum cartridges is more magazine capacity.
As far how the Whelen is able to get the speeds...
The Whelen doesn't have the BC of a 300 win but it is faster with the same weight bullets. I'm getting 3280 with 180 grain TTSX. That is certainly faster than a 300 Winn 180 grain. I've owned and shot 300 winn's and 338 Winn decades longer than I've owned a 35 Whelen
But when a 35 Whelen can...
Not grasping at straws at all. A belt is good exactly for what? You may want to read the data again Speer lists 64.1 grains of CFE223 as max with a 250 grain bullet. More frontal area is exactly tha More.
If the older powders are used to achieve these speeds you will have pressure problems. The Speer data is using Power Pro Varmint, 2000MR and CFE223 fir these exceptional velocities, no one else has used them in this application to my knowledge.
Checking zero on my 30-06 day before deer season, second shot went 8" high. Ejected the case and noticed it didn't look right. On closer examination I noticed it was a 308. Still have no idea how that mix up happened, because I didn't own a 308