You are on the right track. My K Hornet shows a preference for the 50 and 55gn bullets . I gave up trying to find a load for 35grainers .
I leave them for my Martini. The 50 gn Sierra s/p and the 55gn CBE cast work well in mine both using the same dose of 10.5 gns of ADI 2205. These longer bullets seem to stabilize well without having to be driven at full throttle.I guess that is due to the faster twist rate.
Gaz.