Again yes Bubba is capable of overloading anything. Do you really think Speer doesn't know what they are doing and are exceeding normal chamber pressures? That possibility would be next to zero in my opinion. They list Power Pro 2000 MR as reaching 2709 fps, CFE 223 reaching 2664 fps and Power Pro Varmint getting 2617 fps all from an unspecified barrel length which I assume is going to be 26" since that seems normal these days.
No one doubt's a new powder like RL 26 in the 270 or 280 Rem for example reaching a speeds lot higher safely than other powders available previously. It looks like they found a couple of great new powders that work very well in the Whelen and I bet similar sized rounds.
I worked up a load with CFE223 that gets 2,723 avg fps with a 225 gr Partition at less powder than Speer data lists as max for 220 gr. And that is from a 22” 1:16 barrel M700. When test barrel length is not listed, I have my doubts. Take 100 fps off their data and that is realistic for most rifles. Who has a 26” barrel .35 Whelen anyway? JB has a good chapter on the .35 Whelen in Gun Gack #1. Happy Trails
Just a FYI, Speer manual #15 says test barrel length of 24" with 1 in 16" twist. Power pro 2000-MR getting 2709 fps with their 250gr bullet.
