[rdavidsonjr]

Bart your point is well made & is dead on. When Mass x weight x speed x equal physical properties are equal so is energy. But HiBC did a good job making the point I tried to earlier. His reference to the American Rifleman is something I have seen many times. Each of the guns discussed have different ballistics. Therefore at each varying range speed and drop are different. Granted the original post was up to 300 yards and really I Don t think there is enough appreciable difference in these guns to make a noticeable difference. But after 300 I believe due to the magnum chamber pressures you can generate if you want to you will surpass the other 30 calibers with the 300 mag. I believe that over the 0-600 yard range on large game with a good bullet has an edge. I also believe that the same 300 mag can get worse performance with a light core lock that is screaming at closer ranges.