I've seen a good bit of cautionary advice saying don't buy a double in a cartridge without a rim, how much weight should I give this? I'm already set up for .375 H&H, brass is easily attainable, and a Krieghoff in the H&H would be a gem for me- if of course I'm not handicapping a magnificent rifle with a non-rimmed cartridge. .416 Rigby in a Merkel 140 also interests me, however a feel slightly better about the belted H&H over the rimless Rigby. Is this misguided or foolhardy? I would hunt here in Northern Canada with the rifle, as I do with my current .375, and as such lean towards the lighter and conventional end of double cartridge choices, as in the .375 H&H and .416 Rigby mentioned. Much as I'd love a NE cal for the romance, I'd be better served by a more conventional bore and case. Advice is appreciated.