A general pattern is emerging. While cast boolits are capable of outstanding terminal performance, they seem to be capable of this performance only in a narrow velocity range, which somewhat limits their utility for rifles.
As I showed before the 359 Mihec hammer bullet with flat point pin expands magnificently and penetrates to a respectable depth at 1800 FPS. At 1200 FPS it is an icepick.
The 180 Grain Hornady XTP is not capable of quite the performance, clocking just under 1700 FPS in my Marlin with a charge of 16 grains of 300MP. At this velocity though that bullet nearly breaks apart, expanding to almost 3/4" of an inch and penetrates only 13". 80% retained weight. At a lower velocity (same load out of my 5" 686) of 1200 FPS this bullet still performs respectably, getting .58" of expansion and going deeper with 97% retained weight. So this could be a potential one load for two guns situation.
I did some more testing with moderate 357 loads. 13.5 grains of 2400 gets the 162 grain Hammer bullet with the small hollowpoint cavity going to nearly 1250 FPS in my 686. This load expanded beautifully to .635" and retained 100% of its weight. Same load out of my marlin and it blew up, shedding the entire hollowpoint section which broke into two parts and the core traveling to a greater depth. Not even 60% of the weight was retained in the three remaining fragments. It went 1600 FPS out of the marlin.