Sierra gamekings................SD....................Coe ff.
.243,100gr.SBT..................242............... .......430
7mm, 140gr SBT................248......................416
How about these
AccuTip..........................BC............... ....Muzzel velocity............Energy
243, 95ge......................355..................... ...3120......................2053
7-08140gr......................486.................. ......2860......................2542
That is just shy of 500 lbs difference. And their is only 2" of drop difference at 500 yards between the tow. Not to mention the fact the 243 has 462 pounds less at that distance.