Micky,the longer this thread goes along,the more is being written in to it.
Where did the 160 gn projectiles come into the original question.

Have you ever hunted water buffalo and if the answer is YES then I'll bet it was'nt with a 6.5 x 54.

The only reason I mentioned shooting a buff with a 243 was to emphersize that it can be done HOWEVER I would not recomend it as a buff rifle like you are with a 6.5x54.

Forest Gump said it all:-

STUPID IS AS STUPID DOES !!