Re: what should I buy.
Before you chose a cartridge look at the max
distance you want to hunt.
then look at the Energy at your max distance
of each Caliber.
1200ft-lbs for whitetails and 2000 ft-lbs is recomened for one shot kills on Elk.
Example , A 7mm 140gr leaving at 3200 fps
has 2120ft-lbs at 300 yds and 1836 at 400 yds . So 350 yds would be max for Elk.
With the same load Whitetail can be taken out to 650 yds.
At long range a big fast bullet Beats a small fast bullet in energy.
Hope this helps