RE: Darn 243's and Magnums
The same reason Swift just changed their bullet to expand from 1700-3300 fps rather than 1330-3000. Shooting deer at close range with 7, and 300 ultra mags hit deer outside most bullet manufactures design limits, thus bullet doesn't work right and results in us bashing it on the internet, all because we don't read the details of the bullet we use.