Speaking of rare ctgs. that deserve more:

I still have some brass from my first .375/06IMP back in the 1980's that is going strong, necked down and re-fireformed into 9.3x62's.

A favourite load for my new .375/06IMp is a 225 Interlocked heavy jacketed Hornady driven 2,860fps - cloverleafs at 100 meters. The 270gr. TXSX at 2,650fps (moderate) to 2,740fps(max) do likewise. The 4 different varieties of 300gr. bullets, from BT Spizers to FBase RN's and Interbonds, all do 2,470fps.