The 460 Rowland has a longer case than does the .45 ACP, but roughly the same OAL. I'm not saying it will not chamber a .45 ACP, but that would be like a 10mm chambering a .40...yes you can do it, but probably shouldn't.
Now the .45 Super has the exact same dimensions as the .45 ACP and it will, obviously, chamber .45 ACP since they're externally the same size. The .45 Super has, IMHO, better ballistics than the 10mm. The 460 I think requires a 460 barrel and probably a compensator. The .45 Super you can just use an aftermarket .45 ACP barrel (I use KKM) that has better chamber support.
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