Pushes the same bullet as it is brother magnumfaster, harder and flatter
Handloading dream
(pro)

Stouter recoil
Reduced barrel life
Factory ammo limited and downloaded
(con)

Don't own but know afew who have 300RUM's. A little stoutfor mypoor shooting shoulder but a great cartridge. One guy has shot everything from deer to grizzly with his and Nosler Partitions.

A few well versed owners on here will probably point out otherpros to the RUM for you.