thats was kinda my thinking. I went ahead and ordered a box for my 45/70 guide gun but i gave up on the idea of shooting it through my 45acp rounds. oh well i find another crazy arse idea..lol
our WM had a similar thing sold w/plastic sabbots for .50 muzzies. A 250gr bullet w/a yellow tip. Mic at .451 if i recall. Bought several boxes & developed a load based on a 250gr FMJ data I found for 45ACP...
The yella tips don't fit in the gun of course, ya have to grind it down to near the copper (BEFORE ya load them into a shell obviously), and then they cycle ok, but barely within any typical OAL.
The ballistic tip on handgun bullets is to penetrate clothing, not flesh, the one's I dug from the dirt still have good expansion, but would certainly part the hair of most critters rather than fill the hollow. As soon as they hit soft tissue or solid bone the polycarbonate pushes into the hollow & starts the expansion.
MY preference though is a simple 240 gr JHP with a std hollow & no tip, another WM sabboted bullet from Hornady. I made a load for these that I like really well. I'm no great hand-gunner, but was cutting decent groups at 50 yds with no drop, plan to use it on deer... no bears yet in Iowa (though we have our share of Mt Lions, unfortunately they tend to sneak behind ya, rather than at the muzzle end of a JHP)