I haven't personally used a 7mm on plains game, but in 2012 I did a leopard/PG hunt in Namibia with a .338 Winchester. I brought both 225 grain Partitions and 250 grain Woodleigh Weldcores, both loaded by Superior. The leopard was DRT with a 225 grain Partition, as were the PG animals hit with the same load. However, I found the 250 grain Woodleigh to hold together better and mushroom more consistently than the Partition, which usually lost it's front section and then turned into a "wadcutter".
For cats, I would suggest the Partition. But for an "allrounder" either the Woodleigh or an A-Frame. YMMV.
I am currently working up an all around loading for my 7x57 based on the 160 grain Woodleigh.
Good hunting!
