I’ve had good luck with Partitions. But I have questioned whether a 260 gr Partition in my 375 would smash through a big bear’s shoulder bone. On the one had I like them because they seem to penetrate well while making a big hole through the vitals. I’m hesitant to try A-Frames out of concern they’d make a smaller hole and only offer an advantage if they hit a bit bone (not as often as you’d think). Thoughts? I guess I could try a 300 gr Partition and see what happens. For reference my current load will punch through a grizzly but stop on the far side just under the hide.
If your optimum shooting distance is 150 or closer, you'll still get appreciable expansion out of AF.