the africa is different than the express and magnum which the express was chambered in 25/06,270,30/06,7mm mag,300 win mag,and 338 win mag and the magnum was chambered in 375 h&h,416 rigby,458 lott,404 jeffery,458 win mag, there may have been more calibers, and the 458 win mag and 404 jeffery were cataloged but may have not produced.i'm sure sombody out there knows more.