I enjoyed watching the Larry Potterfield "nearly perfect safari rifle" series on youtube.

Does it take a lot to get a 700 to feed a 375/416 Rem Mag sized case as an ADL?

My buddy has a 416 remmag in a BDL. Not sure there's any difference.

I have a Remington 700 in 416 Remington Mag. I had feeding problems including problems on my elephant hunt. I thought all was good to go but when cycling rapidly the problem occurred.
An AR member(AR always comes through)told me to put in a 300RUM magazine box.
The box has the cut out sides that allow the cartridges to stay below the rails longer during the cycle.
NEVER a malfunction since and I use the gun regularly.

I'm a mauser guy but I have a facory SS 700 BDL in 375 H&H that feeds slicker than snot. Its a shooter too. I took it to Africa with me years back in the event I had a chance at an Eland.

I had a group of 4 PH's in Africa tell me 700 Remingtons feed plenty good, they had no issue with a hunter hunting DG with a 700. These guys had been around the block and were all 15-20 yr licenced PH's that had seen it all hunted all. One of the guys who I became pretty good friends with over the years said I've had plenty of hunters shoot DG with 700 Rems and they do just has good as all the rest.

I'm going back in 2022 to hunt Cape Eland and will probably drag that same old Remington with me.