Thread: Q - Mildest 308 load that would reliable kill deer sized game ?

Question - what's the mildest 308 load that would reliable kill deer sized game ?
Assuming a lightish rifle (7.5lb) with a 16-18 inch barrel, suppressed and for arguments sake the rifle shoots them the same accuracy etc.
What route would you go ?
a. - something lightish say 130 gr doing around 2700 fps
b. - something heavier 165 gr doing around 2400 fps
c. - something else ?

I've been looking at 30-30 loads which seem the obvious route but ideally would like to shoot out a bit further to say 300 yards if possible.
Thanks in advance.