Hmm,
I ran the number on a balistics caculator. 139 inter bond BC .486 with a MV of 3200. Wind drift at 500 yards with a 10 mph wind about 15"
175gr Sp at a mv of 2900 and BC of .462 Wind drift at 500 yards with a 10 mph wind is about 19"
Looks like speed still wins. Less time in the air.
More time it takes to get there the more time the wind can move it. Looks like a good 140 in the 7mm is going to be hard to beat.
Of course, the 139g bullet will drift less- you started it faster and used a bullet with a higher BC. Do the same calculation with a 180g Berger and tell me which one has the most drift.
Speed doesnt win, at some point BC wins.
