I have a trip to Zim in Aug for buf plains game and possibly ele. I have 2 375 RUMs but as it is troublesome to get 2 guns of the same cal. through SA. I was thinking of building a second rifle to take. I'm trying to decide between a 416 Rigby, or either a 366 RUM or a 338 RUM. As I will likely only be able to hunt buf and ele once or twice in my life the smaller cal. would be more useful latter on in the States. With the 366 RUM I would still have 2 legal DG rifles with the 338 I would have a better elk rifle and in a bind if the PH would allow I wouldn't hesitate to shoot a buf with a 250 or 265 TSX. I was wondering if anyone has used the 375 RUM or 378 Wby with 350 grain bullets (barnes TSX, banded solid) if so is there much performance advantage on game with the Rigby compared to the big 375s with heavy bullets. Any input would be appreciated!