Here is a new twist on this subject. Ejectors for rimmed cases and extractors for rimless. I have double riles in .375 H&H and .470 NE. The .375 has extractors - and I prefer that. The ejector force on a rimless may cause the plunger to slip off. The extractor system is gentler on the cases. BTW, I've never had one slip off. And those who are unwilling to consider a small or medium bore DR because of the rimless case is doing himself a huge disfavor. Think of how fun and usefull a light compact DR in 30-06 would be.