I really like the Norma brass in 404J and 375 Flanged Mag. I have had bad results with Bertram in 375 Flanged Mag but ok in 500/450 3 1/4” and 500 3 1/4” when I had it.

Woodleigh bullets of course. I am loading with RE15 and Kynoch foam wad.

If you still need dies I will have a dig around over Christmas as I am sure I had two sets and also a spare Lee Factory Crimp die ( I bought a few in special order as was cheaper postage per die. Then gave two away

)