Ok, Drilling, he said FRONTAL AREA, not diameter!!!! Frontal area---assuming we're talking wadcutter bullets with perfectly blunt noses, and not the spitzers typical to the .270:
Area of a circle (the end of the cylindrical bullet--i.e. frontal area of the bullet)=PI*R^2, so for a .270win that's (.277"/2)^2*3.141592654, which equals 0.060 square inches For a .45-70 using a .458" slug, the frontal area is (.458/2)^2*3.141592654, which equals 0.165 square inchest of bullet face. By my calculations, that's 2.73 times the facia area of the .270's bullet.
No argument from me on your math, i'll refer you to my LAST post on my math abilities!! :>
)
BUT, your assumeing that the 270 bullet won't expand, and it WILL in a deer. On the other hand, unless the 45 cal also expands (and it probable won't expand much in a deer) The rules change.
The gun writer that puts it on paper to match MY personal hunting experences best is John Wooters!!! He said what i also think!! What determines how well a bullet kills an animial, is HOW FAST IT EXPANDS inside the animial, BUT, the bullet ALSO HAS TO penetrate to the vitals!!!! (and for me to be happy, exit the animial)
"Ok", now i'm in WAAAY over my head, and you guys are too smart for me!! :>
))
Drilling Man