This is another one of those which is best discussions with not necessarily a "right" answer. I like a DM because I need to load /unload when getting in and out of vehicles and at other times during the hunt, and I really dislike policing ejected loaded cartridges out of deep snow, mud, leaf piles, etc.....

It is strictly forbidden to have a loaded rifle in a motorized vehicle, boat ATV etc in Canada where I do the vast majority of my hunting so a DM becomes quite convenient.

I have never had the misfortune of losing a DM in a good quality rifle, although I have experienced popped floor plates AND issues with DMs when not properly inserted in the cheaper Remington rifles that I found much favour with as a younger poorer man.

I now like my Sako Kodiak .375 with DM and had absolutely no worries about losing a mag on my last DG hunt. I'm familiar with the rifle and I trust it now after some good time in the bush with it.

I do have a Heym Express .416 Rigby on order and yet to be delivered, but I honestly don't recall which type of mag it has!!!????? I guess I'll find out on delivery. It won't bug me much either way and I'll adapt as required, so long as whichever system it uses works as designed.