Originally Posted by
Kosh75287
MY short answer is NO!
My longer answer is that you really shouldn't. The .460 Rowland data was worked up in .460 Rowland brass which is 1/16th inch longer and far thicker in the web area. This translates to lower case capacity for the .460 Rowland.
Using these data in a .45 Super case, the web of which is only slightly thicker than stock .45 ACP, and the capacity of which is only slightly greater than the .460 Rowland, will probably yield attenuated performance and a very real risk of a ruptured case head.
It's been a while since I've looked at the .460 Rowland, but I thought that the conversion kit also came with a permanently attached muzzle brake which delayed slide retraction for precious milliseconds until chamber pressures dropped somewhat. Is this no longer the case?
As to which firearms are capable of handling .460 Rowland pressures, the answer is probably "All of them, at least for a while." A more detailed answer is that pistols with steel forged frames are capable of handling .460 Rowland pressures for more rounds than steel investment cast frames, alloy frames, and polymer frames.