Several years ago I had rotator cuff surgery and I down loaded my 7mm Rem Mag to possibly 6mm or 6.5 performance with the use of
110gr Barnes bullets. This has given me a new found understanding of versatility .... of course any cartridge can be downloaded but what is
unique is I think my downloaded 7mm Rem Mag ammo was cheaper than 243 or 30-30 or 6,5 ammo yet I could at anytime just pop a full power
cartridge in it and it passes the entry point of real powerhouse ammo. I dont know what the absolute effect on accuracy downloading has
but for my needs the ammo worked flawlessly. I believe the loading data was 110gr at 2600 fps
I believe downloading should be considered more often in the choice of rifles and cartridges as you can always load down but you can never
load up unless your reference is the downloaded state. The big thing for me is the cost of components.
If you start with a bigger than you need cartridge, then it HAS to be a popular one with cheap components and I dont think anything beats
the 7mm Mag in that regard.