The 85 Partition was primarily designed for the .244 Remington's 1-12 twist, but some people like the extra velocity in the .243 Win.
The wife of a good friend of mine went on her first hunting trip last year, which just happened to be an African safari. She used a .243 with 85 Partitions killed an impala, a gemsbok and a blue wildebeest, all good trophies, with one shot each. It'll probably do for whitetails.
