According to my ballistic calculator, if you start a 180 grain Sierra Spitser BT out of a 300 Win mag at 3100 feet/sec, at 500 yards it will have a remaining velocity of 2266, energy of 2051 ft/lb and drop 60 inches. A 175 Sierra from a 7mm mag with the same velocity will have a remaining velocity of 2304 feet/sec and 2063 ft/lb and drop 55 inches. At 1000 yards the 7mm will still be going at 1644 feet/sec with 1051 ft/lb and drop 282 inches. The 300 on the other hand will do 1583 feet/sec, have 1002 ft/lb remaining and drop 290 inches. The 7mm will have better penetration because of better sectional density. Maybe the 300 Win can use heavier bullets, up to 220 grains while the heaviest bullet I see listed for the 7mm is 195 grains. Let's take the heaviest low drag bullet, the 220 grain Sierra HPBT Matchking at 2800 feet/sec. At 1000 yards it will go 1607 feet/sec with 1262 ft/lbs of energy and drop 327 inches. You can push a 7mm 162 grain AMax bullet at 3200 feet/sec easy, and it will still do 1895 feet/sec at 1000 yards and have 1292 ft/lbs of energy left, and drop only 243 inches. The 7mm wins hands down in my book. I FOUND THİS İN A NOTHER FORUM. İS HE RİGHT?????