Actually, .308" is 0.030" smaller than .338", and .277" is 0.031" smaller than .308", so that is a closer comparison than 7mm vs. .308.
It seems to me that people have been arguing that .270 kills just as well as .30-caliber for quite some time...![]()
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you are wrong, the absolute difference is irrelevant, the relative expansion needed is :
.308/.284 = 1.085...or .284 bullet needs to expand about 8.5% to become .308 calibre
.338/.308 = 1.097.. or 308 bullet should expand 9.7% to become .338
for comparison .308/.270 = 1.14 or 270 bullet needs to expand a whopping 14% to become a .308 or as much as .308 to become .351





























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