Originally Posted by Tony22-250
The 7mm STW is the parent case it was necked down to .257 and toped with a 100gr bullet reaching muzzle velocities of about 4,060 FPS!
They are both based on the parent case which is the 8mm Remington magnum. I have not been able to get but about 3860 fps out of mine but at that speed it will shoot less than a 1/2" at 100 yards. My gun is a 700 Remington with a 26" Hart stainless heavy barrel. If I can see a jackrabbit that is standing still and there is no wind he is in trouble. Most of my shooting is on my own farm so I know my distances. We have several pivots for irrigation and the fields are 880 yards accross making it easy to judge distance by the track of the pivot.