Gran

"On boar, at least the once I have seen, the only way that they will drop dead is when hit in the spine or brain, otherwise they will keep running."

Yes, but rarely do I see a good heart shot Boar with a 375H&H do much more than go a few paces if any. I know they are solid
and yes, most of the one's I shoot are "on the run" or on the trot knowing something is up.

Would be surprised if the 270 or 300gn Woodleigh weldcore RN
was not up to the job. It was designed around those specs.
I tested the 9.3 bullets (PP and RN) from very high to very low velocity to get Woodleigh the recommended impact velocity. The RN open up at slower speeds, PP's need a bit faster.