Originally Posted by MontanaRifleman
That is simply not true. At one time there was a better selection of 7mm higher BC bullets but that has changed. There is nothing inherently superior about the 7 over the 30 ballistically. The fact is a 30 cal will push the same weight bullet (lower BC) faster than the 7 and it will push a bullet of equal sectional density, form factor and BC about the same velocity. There is no external ballistic superiority. The terminal ballistic superiority goes to the 30.
I don't disagree with you but the whole argument is problematic in that the premise relies on what each cartridge WILL do, not necessarily what it will do with precision and satisfactory accuracy
Case in point: I have a 7 SAUM and a 300 SAUM, all else identical in every way possible, take the bullets you posed, the 215 and 180 respectively. If everything goes right and I want to shoot a target at 1000 yards, you are saying the 300 wins. Probably true, I don't know, never did the test. But what if the best accuracy comes from the slower speed on the 300/215 combo? Losing 200fps or more? But the 7mm/180 combo shows supreme accuracy at the top velocity achievable....seems to me the 7 is going to win now.
All of the repeated debates on this issue seems to fall on best case scenarios day in and day out. Unfortunately, I haven't experienced this to be reality. But I'm not that experienced either.