My goal is to stay below the 40K cup, the problem is using the best interpolation as to what is 40K in 35/40.
Here is what happens from Lyman when going from 308W to 358W with varget maximum loads:
308W  42.5 G 2503 FPS, 60.2K PSI 200 grain bullet
358W 51G     2612 FPS   45.5K CUP 200 grain bullet
I wish both were in CUP
Hodgdon's published maximum loads for 308W and 358W
308W 42 G 2441 FPS 50.1K CUP 200 grain bullet 24 in barrel
358W 51 G 2527 FPS 47.7K CUP 200 grain bullet 26 in barrel
Same thing happens with 06 and 35 Whelen charge weights go up and velocity increases with the same weight bullet, while pressure decreases.

Roughly 20% increase in going from 308W to 358W but the powder may act differently at 308 pressure levels.
I  expect the same thing when going from 30 caliber Krag to 35 caliber Krag. Just how much though?!?!
When I had this action apart I did a touch up lapping of the locking lugs just to make sure I had near 100% contact and found the guide rib was also in contact.