the topic sais it all. l was wondering what you guys think. l hunt ibex with a 7mm rem mag. l was wondering what ammo to use 150 grain federal power-shock or 175 grain psp for hunting at 400-650 meters? ibex runs like hel if not hit properly its a verry strong animal. so what grain amoo has more knock down power at those ranges. andd if l use the 175s will l have to deal with a hell of a lot bullet drop?