Hello, I have a mod 100 Winchester that needs a magazine it is chambered in 284 Winchester, will the 243/308 mags work for the 284? I have not seen a mag specifically for the 284 win. Thanks for any help.

They are different, you will pay through the nose for one.

I have one.
I would swap for an 88 mag in 308.

Jim Wisner makes those.
http://www.wisnersinc.com/mode...ester-models-88-100/

Go here for lots of info on 88/100 mags:

https://www.leeroysramblings.c...del_88_100_info.html