I had a Marlin and a Winchester In that caliber and used by two loads. 220gr Hornady with RL7 and a gas checked cast 265gbr also with RL7.

I still ave a Ruger #3 in 375 Win, it it's sittting at my local shop on consignment. I played with 235gr Spitzers and even 260 Nosler Partitions but accuracy was atrocious.

I keep thinking the #3 will make a great little donor action for a 26 nosler but .....

I ended up having a custom Marlin 356 Win made on an SS laminate rifle with octagonal 21inch barrel and NECGS sights. Olso kept the original 356 Win big bore. Mostly I use 220gr Speer and 200gr Hornady flex tips in that with H4064.

Can't tell the difference on animals when using the respective 220gr loads.