Jorge,
I've seen the 9.3 A-Frames do everything except what a premium bullet should.
The first hit the big shoulder joint of a water buffalo bull. It did make it through the joint but not the rib-cage. It was found resting against a rib, mashed flat and retaining about 50% of its weight. The big problem was the rear core had busted through the partition.
Many people aren't aware that the rear core on A-Frames isn't bonded--just the core in the front end. This is why the rear end of A-Frames often expands, swelling right behind the partition, which also isn't solid. Instead it has a small hole that's filled with a little copper plug.
Saw several other examples of the same sort of failure with 9.3 A-Frames from the same rifle, chambered for a wildcat 9.3 about like the 9.3x64. Muzzle velocity was around 2650 fps, as I recall, which probably contributed to the problems. Have seen A-Frames in calibers from .270 to .30 work fine on various animals from faster magnums, but none of the animals were particularly large, and no heavy bone was encountered. The 400-grain .416's I've seen in action were all started at 2400 fps or a little less, which no doubt helps.
