I've been lurking on this site for a while now and have lusted for a DR for about 50 years...yes, I'm that old (59) and haven't yet jumped into the DR game. I've had double shotguns, both flavors (SXS & O/U) and don't have a real preference for one over the other. However, on the subject of extraction/ejection of rimless rounds...The Ruger #1 has been on the market for about 40 years and has been chambered for rimless rounds all that time. I've had at least 10 'em and have 6 of them in the gun safe as I write this. I've never had an ejection problem with these rifles EXCEPT for very hot loads. In the latter case, most often you simply don't have the mechanical advantage to eject the case or tear thru the rim. With a DR, I suspect you might be able to tear thru the rim. No biggy as a cleaning rod will remove the case pretty much every time. At least it has in my case (over 20+ years using the #1's). Why should the DR be any different if designed and assembled correctly? Second issue...If the .375 is too hot for repeated use in a DR, why does everybody who makes a DR chamber it in their rifles? If the rimmed case is essential, why isn't the .375 H&H Flanged chambered and available? Also, why should the .416 Rigby be any different than any other rimless round? Yeah, I know about back thrust and square inches of case head...yada yada...but the Rigby isn't loaded up to full potential in factory loads anyway. It should be about the same in back thrust as any of the .470/.450 #2 etc rounds.

Finally, anyone dumb enough to hunt with hot loads that present a sticking problem should get stomped and/or chewed. It will remove that particular risk from the gene pool which might save us some trouble down the road.

I would prefer a 450/400 3". However, considering the cost and availability of brass and components, I've just about decided on a .375 H&H. Would I prefer a rimmed case...yes. However, the preceeding sentence says it all. If you can't get components, or reasonably priced brass, then its out of my league as I buy shooters, not investment arms. So far there hasn't been a buff or elephant in my pea patch, but a .375 will have to do whenever that happens. FWIW..Pilgrim