My question would be to when people are saying use a "big enough" gun, what are they referring too? What is the practical difference between the .257 vs. .277 vs. .308 dia. bullets? Is it the Sectional Density .257, 120 gr =.26, .277, 140gr=.26 or the .308, 180gr=.27? Or is it the retained energy downrange. I have read in articles that a round should have a S.D. of .25 or more and energy of 1500 ft-lbs for elk size animals, if this is the case then the 25-06 should be good out to 250 yds. As long as you stay within range it should do the trick as long as you do your job.
