From an article on bullet calibre and killing on relatively fragile White Tail Deer:
Why Rifle Calibers Don't Matter Much.
From the Article:
"
Once you get to at least a .24 caliber bullet of reasonable sectional density (about .218), construction and sufficient impact velocity to destroy blood-bearing organs and quickly end circulation, the differences in killing power become minor on a light and fragile animal like a whitetail deer. We might like to think that at 150 yards, the maximum range at which an estimated 98% of deer are taken, there is a huge difference between a relatively low energy .30-30 and a more than double the energy .300 Magnum. However, there is actually no significant difference in killing power. Both are more than sufficient to take a whitetail deer quickly, cleanly and efficiently."
