RE: Bullet weight and energy per pound of animal
Heres a comapro between the two.
................................................10 0yds...........200.................300
......................................fps
.243 100gr Fed.BT........................2760.............257 0................2380
.257.117gr remcoreloc...................2291.............1961 ................1663
................................. Energy
243...........................................1690 .............1460................1260
.257..........................................1363 ..............999..................718
The .243 has almost twice the energy than the .257 at 300 yds. The .243 at 300 yds is what the 257 is at 100.