John,
Sorry but I have no experience with Woodleighs in 375 H&H on game as I haven't owned a 375 for quite a long time.

As I've stated elsewhere I have used Woodleigh PP's in 270, 7mm and 30 cal, and they work very well giving excellant expansion and penetration.

Most of my shooting these days is with 400-350 and 470 doubles and PP's are not available in either of those calibers at this point in time.
I do wish Geoff would do some 250gn PP's in .358 as I would certainly switch over from the 250gn Hornadys that I'm using at present.
I get good results from the Hornadys at the velocity the 400-350 produces but I am sold on the weldcore design and would prefer to use that type of bullet.

I'm sure other members here can offer some details regarding Woodleigh 235 gn PP's performance at 375 H&H mag velocities though.