I haven't fired either one of these, so all I know is "what I read in the papers." I do know that Ed Matunas preferred the .416 Rigby slightly because it developed lower chamber pressures; hence, he figured, less likely to jam when some beastie was charging one at full-steam. He did also note that the .416 Remington is more available and somewhat less expensive.
Like I said, based SOLELY on reading....
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